Utilization and Usability of Delaware Traffic Management Products: A Survey and Challenges

To address the growing problem of congestion, delays, and overall traffic issues, DelDOT (Delaware Department of Transportation) established the Transportation Management Center (TMC) in 1997. DelDOT-TMC also coordinates and manages DelDOT’s response to any incident that impacts the multimodal transportation system within the state of Delaware. Among other things, DelDOT-TMC collects traffic, roadway weather, and hydrological data using over a thousand monitoring devices installed throughout the state of Delaware. After data has been obtained, DelDOT-TMC analyzes and disseminates real-time travel information to the public through DelDOT’s website (online interactive maps), smartphone application, traffic advisory radio, and social media sites such as Twitter, Facebook, YouTube, Blog, and Flickr; however, the utilization and usability of this information by the public are, for the most part, unknown. The purpose of this study is to evaluate the global responsibilities of DelDOT-TMC and assess the process that DelDOT-TMC uses to gather, process, analyze, and distribute traffic and roadway weather data to the public. The study employs a survey to assess the utilization of DelDOT- TMC’s products, i.e., DelDOT Mobile App, WTMC 1380 AM travel advisory radio, DelDOT’s public website, DelDOT’s social media, as well as the usability of the DelDOT mobile app to check DART (Delaware Authority for Regional Transportation) First State transit service schedules.

motor vehicle transportation are undeniable. It follows then that problems such as congestion, delay, pollution, safety and parking will continue to occur [1]- [10].
To solve the transportation problems and improve transportation facilities and services, it is critical to understand the magnitude and the location of issues, as well as any associated need for improvement. Such understanding comes from accurate traffic data collection [11]- [16].
Traffic data is an essential element in programming, planning, designing, and evaluating the performance of individual roads (AADT and axle-load data) as well as the entire road system (vehicle-miles of travel, or "VMT"), pavement conditions [17] and performance of transit facilities [15] [16] [17] [18] [19]. When conducting a highway performance measure, traffic data can often be a useful tool for users such as the Department of Transportation, metropolitan/local planning, the Federal Highway Administration (FHWA), and the general public [12].
DelDOT has been responsible for maintaining the majority of the state's public roadways since 1917. Managing the state's traffic conditions is one of the Del-DOT's primary responsibilities. To operate the state's transportation efficiently, DelDOT announced its initial integrated transportation management strategic plan in 1997, seeking to reduce congestion and delay, increase safety, reduce operating costs, and improve systems' performance [13]. The 1997 strategic plan acknowledged different strategies with associated actions to monitor the implementation of transportation management in the State of Delaware. Implementing a centralized TMC was the primary goal set by the department to create the necessary infrastructure to support the state's transportation management team [13].
Through DelDOT-TMC, a series of strategic plans were developed to provide safe and accurate traffic data. The first strategic plan was to disseminate accurate real-time traffic information so that users could make informed decisions concerning travel route, travel time, and modal choice. The second strategy was to develop partnerships with County Emergency Operations Centers (EOCs) and State Police to support transportation management activities. By doing so, Del-DOT would be able to implement a coordinated and timely incident response. Further, DelDOT would have the opportunity to partner with the private sector, counties, and local agencies. Developing an internal capacity to support transportation management by providing staff training and organizational structure was identified as the third strategic plan [13].
DelDOT established and started operating a full-time centralized TMC in 2002. DelDOT-TMC was found to be the center for a databank, meaning that it would be the primary traffic and roadway weather data source for different divisions within DelDOT. Currently, DelDOT-TMC is a 24-hour a day, 365-day a year statewide operating system that coordinates and manages DelDOT's response to any incidents or events that influence the multimodal transportation system within the state of Delaware [13]. This paper is organized as follows. Section 2 examines multi-state data source types, accessibility, data dissemination products and the presentation format provided for end users. Section 3 presents a survey questionnaire developed to provide a better understanding of the utilization and usability of the products of DelDOT-TMC such as DelDOT Mobile App, WTMC 1380 AM travel advisory radio, DelDOT's public website, DelDOT's social media and DART transit service. Section 4 presents the results of a survey questionnaire to assess end user utilization and usability of DelDOT-TMC products and their personal experiences. Section 5 provides a summary, conclusion, and recommendations based upon the comparison data discussed in the previous sections.

Ways of Communication to the Public
DelDOT-TMC collects traffic data using both manual and automated methods [13]. Manual traffic counting is conducted using trained personnel and data collectors. Most studies of manual counts require small samples of data at any given location. Manual counts are used when the effort or expense associated with automated equipment is not justified or practical. Automated counts are collected using sensors, detectors, and cameras. Examples of automated data include traffic, roadway weather, and hydrological conditions [13].
After data is captured and processed, DelDOT-TMC disseminates real-time information to allow customers to make informed decisions regarding travel time and modal choice. Real-time monitoring is defined as the same instant that condition occurs. DelDOT considers real-time to be within a 5-minute time frame [13]. TMC uses real-time monitoring to provide customers with traffic and roadway weather information using various websites, DelDOT smartphone app (the DelDOT Mobile App), traffic advisory radio, and social media sites.

Traffic and Roadway Weather Data from Various Websites
DelDOT-TMC uses multiple websites to disseminate traffic and roadway weather data to the public. These websites include DelDOT's website, TMC Extranet, Journal of Transportation Technologies TMC "data map" website, TMC "Weather Summary" website, travel advisory radio, and social media sites such as Twitter, Facebook, and YouTube. Using these websites, DelDOT-TMC provides access to travel advisories and live traffic cameras.

DelDOT's Public Website
DelDOT's website offers real-time traffic and roadway weather information to the public. This website allows users to access traffic travel information through interactive travel maps, real-time schedule of DART transit, real-time travel advisories, events (i.e., road closures, beach traffic, special events), construction projects, news (including press release and traffic alerts), and workshops. This website also allows users to report road issues to DelDOT-TMC, listen to the live traffic advisory radio enabling users to receive information hands-free and access the social media sites through the website. DelDOT's public website also provides interactive Google maps, which display the location of traffic cameras, weather stations, and travel advisories and road closures throughout the state of Delaware.

TMC Extranet Website
DelDOT-TMC uses the TMC Extranet website to provide downloadable and printable traffic counts to the public. On this website, two tabs provide count studies data and documents for various preparedness plans. Under the "Count Studies" tab, the current extranet website contains downloadable PDF files of historical traffic data and traffic counts dating back to 2006. The site allows users to access various traffic data categories such as turning movement counts, classification counts, travel time runs, tube data, and radar data.
For each county, the TMC Extranet website also provides evacuation maps and information for all types of incidents and hazards. The "TMC Docs" tab includes preparedness plans including PDF format bridge closure, debris management, toll plaza, transportation incident and event management, and all hazard evacuation.

TMC "Data Map" Website
DelDOT-TMC uses TMC's "data map" website to provide traffic data. This website is not easily searchable by the public using regular web surfing. This website provides the following real-time data (Figure 1).
The TMC "data map" website provides real-time traffic volume through the "TMC Data Visualization" tab. This data is provided for each location (latitude and longitude) and counties (Kent, Sussex, and New Castle) within the state of Delaware. The website also allows users to view real-time travel time between two points on any given segment of a highway or street. It provides the base and current travel time in a side-by-side fashion. The "TMC data visualization" window offers travel time of 298 possible road segments.
The TMC "data map" website also provides users with access to live traffic cameras that are installed throughout Delaware's highways and intersections.
The "Traffic Cameras" tab is a useful tool that allows the user to view real-time A. Faghri et al.

TMC "Weather Summary" Website
In addition to traffic data, DelDOT-TMC also disseminates roadway weather data using its own "Weather Summary" website. In this website, a map-based Delaware weather monitoring system is provided. As per the department's website, the current Delaware weather and weather advisories are generated by the National Oceanic and Atmospheric Administration (NOAA); however, the site is not visible to the public.
In this "Weather Summary" website, the "Weather Station Summaries" tab Journal of Transportation Technologies allows users to access weather data by location. Users can expand each location to view all detailed real-time weather data. The "Weather Stations" tab provides weather data that includes surface temperature, subsurface temperature, air temperature, relative humidity, dew temperature, precipitation, visibility, wind speed, wind gust, and wind direction. The "Weather Charts" tab provides real-time weather information using (Time vs. Weather Data) charts for each weather station.

Traffic Data from Radio
The traffic advisory radio station provides users with daily information on real-time traffic, weekly construction, transit, and public workshop announcement.
Through DelDOT's designated AM radio frequency (WTMC 1380 AM), Del-DOT-TMC broadcasts traffic advisory radio to update travelers on roadway and transit conditions. The WTMC 1380 AM radio station is a service of the Del-DOT, broadcasting from a location near the city of Wilmington, Delaware with eleven repeater sites throughout the state. In addition to the radio broadcasting, this travel advisory communication can also be accessed through the DelDOT Mobile App. As a means of advertisement, signs are often posted to inform motorists to tune to the radio station for any traffic advisories.

Traffic Information through Social Media
Social media sites such as Twitter, Facebook, YouTube, Flickr, and Blog have also been employed by DelDOT-TMC to disseminate traffic information. Users can access DelDOT's social media sites either directly from the DelDOT Mobile App or by going to the department's social media accounts. DelDOT informs and updates the public through social media by posting travel advisories to let Delawarean's know the current traffic conditions so they can make better informed decisions before heading out on the road.

Methodology
DelDOT-TMC services are offered not only to its employees but also to the general public. To provide a better understanding of the utilization and usability of the products, a survey was employed to support this study [20] [21]. For this survey, the general public was chosen because they are the intended users for the products such as the DelDOT mobile application, social media sites, and travel advisory radio; where, having access to their feedback is critical. Since traffic and weather data are needed for evaluation and analysis of highway performance, the study also surveyed employees of DelDOT, related state agencies, and academic partners. For the survey, a specific evaluation criterion was not necessary since DelDOT's services are open to not only professionals and academia but also the general public. The questionnaire was distributed largely electronically via email. However, surveys were also distributed and collected via paper format. As previously stated, DelDOT-TMC uses specialized equipment to collect traffic data and then uses various resources to provide information to the public. Del-DOT-TMC provides information about traffic, weather, road condition, projects, etc., through the DelDOT Mobile App, travel advisory radio, DelDOT public website, and various social media sites. In today's society, there are various applications and websites that can also provide traffic and weather information, etc. Given the effort and resources that DelDOT-TMC spends on collecting real-time traffic and weather data and the availability of data resources outside of Del-DOT, it was very important to conduct a survey to examine the use of the available services. For the survey, participants were asked several questions about the many available products of DelDOT-TMC and their personal experiences.

Questions
To achieve the survey's objective, a questionnaire was designed and prepared both in electronic and hard copy. The original questionnaire can be found in the appendix of this paper. The questionnaire has questions in six parts (general, DelDOT Mobile App, WTMC 1380 AM travel advisory radio, DelDOT public website, social media sites, and DART). The completion of the questions was designed to take approximately eight minutes. The survey group was informed that their responses would remain confidential. The following questions were asked: Journal of Transportation Technologies Following a question regarding the survey's objective, the first set of questions is listed as follows: 1) Which of the following represents your current status? Check boxes were provided for Delaware department of transportation employee, DE state agency employee, engineering consulting/private engineering firm employee, faculty, staff or student of UD, individual who uses Delaware roadways, and a fill-in space for indicating "other" status.
2) Approximately, how many miles do you drive per week on Delaware roads?
The survey question asked for either a reported or estimated weekly mileage in miles.
Following the first question set, the second part asks nine questions about the utilization of DelDOT Mobile App. A respondent who does not use this smartphone application will only answer the first and last questions of this section. find out about traffic delays, accidents, and other advisories, to find out the latest news and upcoming workshops, to see snowplow movement during snow events. 9) Based on your experience, would you recommend the DelDOT Mobile App to a friend? Single selection choices were provided for following with a fill-in space for other conditions: definitely will, probably will, probably will not, definitely will not.  17) Based on your experience, would you recommend the WTMC 1380 AM radio to a friend? Single selection choices were provided for following with a fill-in space for other conditions: definitely will, probably will, probably will not, definitely will not. 18) Please tell us what improvement(s) you like to see in DelDOT's WTMC 1380 AM radio to use it more frequently. If No for Q12, go to Q19. 19) What is the reason you do not currently use the DE travel advisory radio?

10) Please tell us what improvement(s) you like to see in DelDOT Mobile App
Single selection choices were provided for following with a fill-in space for other conditions: no idea it exists, I tried it, did not work properly, I do not need to use it. Part four asks seven questions about the utilization of DelDOT public website for traffic and roadway weather data inquiry before starting a trip or while driving. Respondents who answer "no" for the first question meaning they do not use the site will be directed to the last question of the section of the survey. 20 22) How often do you visit DelDOT's public website to find out traffic data or real-time traveler's information? Single selection choices were provided for following with a fill-in space for other conditions: everyday, as needed, once in a while, almost never. 23) In your opinion, how informative is the DelDOT's public website? Single selection choices were provided for following with a fill-in space for other conditions: very informative, informative, somewhat informative, not at all informative.
24) Based on your experience, would you recommend the DelDOT's public website to a friend for travel information? Single selection choices were provided for following with a fill-in space for other conditions: definitely will, probably will, probably will not, definitely will not.

25) Please tell us what improvement(s) you like to see in
DelDOT's public website to use it more frequently. If No for Q20, go to Q26. 26) What is the reason you do not currently use the DelDOT's public website?
Single selection choices were provided for following with a fill-in space for other conditions: No idea it exists, I tried it, did not work properly, I do not need to use it. The fifth part asks seven questions about the utilization of social media sites such as Twitter, Facebook, YouTube, Flickr, and Blog. A respondent who replies "no" to the first question of this section saying he/she does not use these sites will be directed to the last question of the section of the survey.

Survey Results
The survey begins by examining the current employment status of the individuals taking the survey. As shown in Figure 2, the participants were offered six categories. The overall results revealed that 34% of the participants were engineering consulting/private engineering firm employees; 22% were faculty, staff, or students at University of Delaware; 19% were Delaware Department of Transportation (DelDOT) employees; 17% were individuals who use Delaware roadways; 5% were in the others category (i.e. New Castle County employee); and the remaining 3% were Delaware state agency employees.

Figure 2. Participants makeup. Journal of Transportation Technologies
Participants were then asked to estimate their weekly driving mileage on Delaware roads. Figure 3 shows that the results revealed that 8% of the participants stated that they drove between 0 to 10 miles; 19% drove between 10 to 50 miles; 23% drove between 50 to 100 miles; 24% drove 100 to 200 miles and 23% of the participants stated that they drove more than 200 miles per week on Delaware roads. In addition, 4% stated mileage as other(s) and specified in narrative form.

DelDOT's Smartphone/Mobile Application
Smartphone applications are very popular in today's society. One of the services that DelDOT-TMC offers is the DelDOT's smartphone and mobile application. Participants were asked if they use the application and they simply had to state "yes" or "no". As shown in Figure 4, the results revealed that 33% of the participants said "yes" and 67% stated "no", they did not use DelDOT's smartphone or mobile application.
For those who used the applications, participants were asked how often and how comfortable were they in using the applications. Although it is against the law to use a cellphone in Delaware while driving, the overall results revealed that only 5% of the participants stated that they use the DelDOT Mobile App every day, but majority of the participants (43%) use it "as needed". The results also revealed that at 30%, majority of the participants stated that they were "neither comfortable nor uncomfortable" with using the applications. The lowest percentage was at 9% in which the participants stated that they were "slightly comfortable" in using the application while driving.  The participants were also asked how user-friendly and accurate or informative is the DelDOT Mobile App. 35% of the participants stated that the DelDOT Mobile App was "friendly" and 35% stated that it was "somewhat friendly". The lowest percentage was at 4% in which participants found that the application was "not at all friendly". When examining the accuracy of the DelDOT smartphone/mobile application, 57% of the participants found it to be "accurate/informative" while only 4% found it to be "very accurate/informative". Interestingly enough, none of the participants stated that they found the app to be "not at all accurate/informative". Although some of the participants stated that they have or are using the Del-DOT application, participants were asked to provide specific reasons on what they use the application for and if they would recommend it to a friend. Figure 5 shows that, at 25%, majority the participants stated that they use the DelDOT smartphone application "To find out about traffic delays, accidents and other advisories". The lowest percentage was at 3% in which participants stated they use the application "To learn about special events" and another 3% also stated that they use the application "To find out the latest news and upcoming workshops".
The majority of the participants (59%) stated that they "probably will" recommend the DelDOT mobile application to a friend while only 9% stated that they "probably will not" recommend the application.
For those who use the application, they were asked the following: "Please tell us what improvement(s) you like to see in DelDOT Mobile App to use it more frequently". The following recommendations were suggested that DelDOT should: 1) Provide more accurate information; 2) Improve camera feeds since the camera feeds freeze frequently and sometimes it does not show up at all; 3) Provide a link to road closure advisories to the Travel Map.

4) Make the application convenient to use while driving
For those individuals that stated that they do not use the DelDOT application, they were then asked, "What is the reason you don't currently use the DelDOT App?" Majority of the participants, 59%, stated that they had "no idea it exists", while 39% stated "I don't need to use it".
The overall results revealed that majority of the participants did not use the DelDOT's smartphone or mobile application. Those who used the application used it as needed. Also, majority of the participants who used it found it to be friendly and accurate. The majority of the participants used the smartphone application to find out about traffic information such as accidents, delays, and other advisories. Although they had recommendations on how to improve their application, participants stated that they would recommend the mobile applications to friends. Those who did not use the DelDOT's smartphone application stated that they had no indication that the application existed.

DelDOT's WTMC 1380 AM
Another service that DelDOT-TMC offers is DelDOT's WTMC 1380 A.M. travel advisory radio, in which participants were asked if they are using the service. As shown in Figure 6 below, result of the survey revealed that 86% of the participants said "no" for listening to the travel advisory radio and only 14% said "yes".
Those who used the radio were asked the frequency of their usage, the typical reason of why they listened to it, and the time of day in which they listen to WTMC 1380 A.M. while driving on Delaware's highways and streets. At 46%, majority of the participants revealed that they use the travel advisory radio "as needed" and the lowest percentage, which was at 8%, stated that they "almost never" use it.
The results also revealed, as shown in Figure 7 below, that majority of the participants, at 31%, listen to the radio "to check on traffic condition" and an additional 31% listened "to find out about traffic delays, accidents and other advisories". The lowest was at 4% in which individuals stated that they listen to the radio "to check weather incidents".  As for the time in which participants listened to the radio, the results revealed that 60% stated that they listened to the radio "any time in the day". None of the participants stated that they use the radio "any time at night".
For those who used DelDOT's travel advisory radio, participants were asked how informative they found it to be and if they would recommend it to a friend. The result revealed that 50% of the participants stated that the radio was "somewhat informative". The lowest percentage was at 20%, in which individuals indicated that they were "very informative". (0%) None of the participants stated that it was "not at all informative". As for the recommendation, 50% stated that they "probably will" recommend the WTMC 1380 AM radio to a friend but 20% of the participants said that they "probably will not".
Those who did not use the WTMC travel advisory radio were asked the reason behind their decision. At 51%, majority of the participants stated, "I don't need to use it" while only 3% stated, "I tried it, didn't work properly".
Overall, the results revealed that majority of the participants did not use DelDOT's WTMC 1380 AM travel advisory radio because they stated that they did not need to use it. For those who did use the travel advisory radio, they used it as needed. Most of the participants listened to the radio anytime during the day and they mostly listened to find out traffic condition, delays, accidents, and advisories. Those who used the radio found it to be somewhat informative and they stated that they would probably recommend it to a friend.

DelDOT's Public Website
DelDOT-TMC has a public website that provides real-time traveler's information. Participants were asked if they visited DelDOT's public website and as shown in Figure 8, 70% of the participants said "no" and 30% said "yes".
Those who used the website were asked the type of information that they usually look for and how often they viewed the website to find out traffic data or real-time traveler's information. Figure 9 shows that participants had many Journal of Transportation Technologies  options and the results revealed that at 23%, majority used the website "to check on traffic condition". The lowest percentage was at 3% in which the participants stated that they used the website "to learn about special events".
The results of the frequency in which participants viewed the website revealed that 50% visited DelDOT's public website "as needed" and only 9% viewed the website "every day".
Those who used the website where then asked how informative DelDOT's public website is and if they would recommend it to a friend for travel information. The results revealed that majority of the participants, 45%, stated that the website was "informative" and 18% found it "very informative". Overall, all of the participants that used the website found it to be, in one-way or another, informative. The results also revealed that 64% of the participants stated that they "probably will" recommend the website to friends, 18% revealed that they "definitely will", and the remaining 18% stated that they "probably will not".
For the individuals who have stated that they do not currently use DelDOT's public website, they were then asked to provide a reason. The result revealed that 63% of the participants have stated, "I don't need to use it" while 2% stated, "I tried it, didn't work properly". Journal of Transportation Technologies The final result revealed that, majority of the participants did not visit Del-DOT's public website for real-time traveler's information because they did not need to use it. Those who did use the website stated that they used it as needed to check on traffic condition. The participants also found DelDOT's public website to be informative and that they would probably recommend it to their friends.

DelDOT's Social Media
Among the previously mentioned services, DelDOT-TMC also offers traffic, weather, and much more through social media such as Twitter, Facebook, You-Tube, Flickr, and Blog. As part of the survey, participants were asked if they used any of the social media sites that DelDOT offers. The results in Figure 10 revealed that 85% of the participants stated "no" they don't use DelDOT's social media sites and only 15% said "yes" they use at least one of DelDOT's social media.
Participants were then asked what they use the DelDOT social media sites for and how often they use it. The survey revealed that some of the participants specified that they wanted to find out traffic closures and office closings. Others were interested in the latest news, traffic updates, and current projects. One participant stated that they are simply trying to find out if anything interesting occurred. As for the frequency of usage, 67% of the participants stated that they use DelDOT's social media sites "as needed" and only 22% claimed that they use it "every day".
Those who used DelDOT's social media sites were also asked which of Del-DOT's social media site did they usually use to obtain travel information and how informative did they find the sites to be. The results revealed that 57% of the participants stated that they use DelDOT's Facebook, 36% used Twitter; and only 7% used YouTube. As shown in the chart in Figure 11, none of the participants revealed that they use DelDOT's Flickr or Blog to obtain travel information.
Regardless which of DelDOT's social media sites that the participants used, 56% found the sites to be "informative" and 22% stated that it was "very Informative" and the remaining 22% stated that it was "somewhat informative".  Those who did not use any of DelDOT's social media sites were asked to provide a reason for their decision not to visit these social media sites. The results revealed that 72% of the participants stated, "I don't need to use it" and 3% stated, "I tried it, didn't work properly".
The overall results revealed that majority of the participants did not use Del-DOT's social media sites. Those who did not use the social media sites stated that they did not need to use it. The participants that used it to obtain traffic information as needed and they found it to be informative. Out of all DelDOT's social media sites, Facebook was most often used.

DART
One of the most common services that DelDOT offers is the DART first state bus services. A part of the survey asked participants if they use DART. The results shown in Figure 12 revealed that 89% of the participants' stated "no" they don't use the service and 11% said "yes".
For those who used DART bus, participants were asked how often they used DART and what services they used to check bus schedule. Overall, the results revealed that 50% of the participants stated that they use DART bus services "everyday" and 13% stated that they "almost never" use it. In addition, 43% stated that they use the DelDOT mobile app to check bus schedule and the lowest percentage was at 29%, in which individual revealed that they use "printed brochures". Interestingly enough, as shown in Figure 13 below, the results also revealed that 0%, none of the participants used" DART's website" to check bus schedules.
Those who stated that they did not use DART first state bus were asked to provide a reason. Majority of the participants revealed that they did not use DART services because they have their own vehicle. Others have stated that it is inconvenient, and a few said they did not have bus services near their homes.
Overall, majority of the participants do not use the DART bus services mainly because they have their own vehicles. Majority of those who use the bus stated that they use it on a daily basis. To check the bus schedule, most participants use the DelDOT mobile app.

Summary
In summary, the use of DelDOT-TMC products and services is relatively low; where, it was discovered that a majority of the participants did not use Del-DOT's products and services. Figure 14 below, highlights the summarized results from the survey regarding use of DelDOT-TMC products and services; where, there is an average 21% use across the studied DelDOT-TMC products and services (with a standard deviation of 10.1).

Conclusions
The purpose of this survey was to examine the usability, if any, of DelDOT's website, social media sites, radio, smartphone application, and DART services. The survey revealed interesting results. Overall, it was discovered that a majority of the participants did not use DelDOT's products and services. Those who did not use the services stated that either they did not have a need for it, or they did not know it existed. The participants that used the different services did so mainly to obtain traffic information. These individuals also used DelDOT's services as needed and most found it informative and friendly to use. Out of all of the mentioned DelDOT services, it was discovered that participants mostly used DART bus services.
DelDOT-TMC is an important part of Delaware's transportation industry.
Real-time and historical traffic data, as well as roadway weather data, is essential information not only for the public but also for academia, students, engineering consultants, and the different divisions in DelDOT. Although DelDOT-TMC has provided a lot of travel information through the previously mentioned sources, there is certainly room for improvement. The following are suggestions to Del-DOT-TMC on possible improvements based on the research results: 1) Advertise the products so more people are aware that they exist; 2) Provide accurate and more information through all the products; 3) Improve the database to allow the public to download or export the collected data in multiple formats; 4) Expedite the approval process for users or provide free access to the website; 5) Provide real-time and historical data on all of the sites so that users can search for information based upon a specific range of time and date; 6) Provide transportation data in other formats in addition to PDF files; 7) Offer easier access to the "TMC Data Map" and "TMC Weather Summary" websites; 8) Produce an automatic broadcast traffic advisory system through the Del-DOT Mobile APP in compliance with Delaware's hands-free law.
As the number of drivers continues to increase, so will the need for traffic and road weather information. Therefore, more research will be needed to improve our transportation system. This study was based upon the current resources that DelDOT-TMC offered to the public and the survey result conducted by the study; however, future work is recommended to obtain more information via coordination with DelDOT-TMC, directly. By interviewing or communicating with Del-DOT-TMC staff directly and securing access to additional resources, it may be possible to gather and assess vital information that is not currently available online. Although this study was conducted for the State of Delaware, other states, regional and private transportation agencies may use the methods explained in this paper to make a comprehensive assessment of the usability of their own traffic-related products.