METHODOLOGY
The study consisted of a field test over the months of October 2019 to March 2020 along five V2X-equipped corridors in the Salt Lake City metropolitan area. Data was collected during and…
METHODOLOGY
For this CV-based TSP application, DSRC radios from four vendors were installed at 30 intersections and on several buses for communication between vehicles and roadside infrastructure.…
METHODOLOGY
This project used a communication process which uses latitude/longitude coordinates of CAVs and intersections to define the detection zone and enables information sharing. Once the…
Methodology
Related bus data from UDOT and Utah Transit Authority (UTA) for the deployment site was first collected to conduct the B/C analysis. Travel time savings served as the main metric used to…
The DSRC radios were installed at 30 signalized intersections along Redwood Road, from 400 South to 8020 South to broadcast both Signal Phase and Timing (SPaT) and intersection geometry (MAP)…
RESULTS
The analysis found that GPS-based TSP strategies can provide transit delay reductions and travel time savings as effective as traditional TSP tools, but with greater flexibility and lower…
RESULTS
The implementation of TSP and GPS-enabled TSP systems decreased transit travel time by approximately 8.5 percent and 9 percent, respectively. These time savings held even in scenarios in…
Test Methodology
Testing occurred over two days (19-20 November 2013) on six segments of approximately 40 miles each along I-80 west of Salt Lake City. The following test equipment was used:
Two…
One such funded project includes the WPT electric bus implementation at Utah State University (USU) and later the University of Utah. A start-up at USU named WAVE (Wireless Advanced Electric Vehicles…
Traffic signal pre-emption systems allow a temporary interruption to normal operation of traffic signals to give emergency vehicles priority. This is done by changing traffic signals in the path of…
MethodologyThe Salt Lake City branch of the Crescent Electric Supply Company (CESC) wanted to increase its total number of deliveries while reducing the average amount of time for each fulfillment.…
METHODOLOGYTo evaluate the project, a pilot test was conducted to demonstrate operations from January through April 2013. Several storm events occurred during this period. Operational data were…
FINDINGS
The evaluation quantified the reduction in the type of side collisions that SODS could prevent. The performance of SODS in identifying side objects was limited to objects located toward the…
Findings from Salt Lake City, Utah
Salt Lake City is a medium to large-sized urbanized area located in North Central Utah. The most significant tourist activity in the Salt Lake City Region is…
RESULTS
By examining the labor and materials cost for winter maintenance in the 2004-2005 season for 77 UDOT sheds, an artificial neural network model was trained and tested to establish the shed…
RESULTSThe system resulted in a small increase in the number of travelers satisfied with their travel experience; 87 percent compared to 85 percent. Even though the difference is not statistically…
Notes:See also: Perrin, Joseph, et al. Effects of Variable Speed Limit Signs on Driver Behavior During Inclement Weather. Paper presented at ITE 2000 Annual Meeting. Nashville, Tennessee. 6-10 August…
Use UAS during routine inspections of large, long, and complex bridges. On such bridges, the reduction in time required for an inspection using a UAS, compared with that needed for a traditional…
The following recommendations were discussed:
Use industry standards when planning DSRC communication links between intersection signal controllers and roadside units (RSU). Field experience shows…
Transit Signal Priority at Two Agencies
The San Francisco Municipal Transportation Agency (SFMTA) uses TSP for both light rail and buses at many intersections in the city. TSP systems used in San…
Managing Traffic During Construction: The Utah DOT I-15 CORE Project Experience
This report highlighted the use of work zone ITS during the I-15 Corridor Expansion (I-15 CORE) project along a 24-…
Based on the findings of the study, the following recommendations are made to current and future traveler information system operators and their partners:
Make traveler information systems more…
An independent evaluation of a Side Object Detection System (SODS) for transit buses analyzed quantitative and qualitative data to determine its Return on Investment and the extent of operator…
The significant lesson learned from the deployment is the importance of the working relationships that UDOT and other State and local/municipal agencies have developed. UDOT was proactive in working…
A key to the success of the CommuterLink Expansion has been that the system is designed to accommodate future expansion and added functionality. Key lessons learned from the CommuterLink Expansion…
ITS system enhancements can help agencies meet potential heavy transportation demand. Overall, the Salt Lake City system performed well given the extreme demands of the 2002 Winter Olympics. It is…
One of the major themes that arose in the discussions with UDOT staff was the need for better visibility into the design and development process of the CommuterLink software enhancements. What began…
Standardize the system environment.
With a system deployed over the course of many years, one of the challenges is how to incorporate advancements in technology without ending up chasing…
Experience from early deployers has found that the majority of 511 system usage will be driven by specific major events. These events will most likely be weather related, but they could also include…
Create a strong System Manager role to focus accountability and clarify roles and responsibilities with multiple contractors.
Many of the issues identified during this assessment pointed to the…
Choose software that meets your agency's particular requirements.
In particular, think carefully about using software developed for another agency. While the decision to utilize the Georgia DOT (…
Maintaining accurate information about the current configuration was a challenge during the CommuterLink deployment. On a frequent basis, the contractor would add components and integrate new…
Utah DOT developed a project based on the initial 2016 deployment of a full Dedicated Short-Range Communications (DSRC) corridor that supported transit signal priority (TSP) controls to leverage…
Side Object Detection Systems (SODS) for transit buses have the potential to improve transit bus safety by helping operators avoid collisions with side objects. Although transit bus collisions are…
In 2002, the Utah Transit Authority (UTA) in Salt Lake City implemented the Connection Protection system to better coordinate passenger transfers between the TRAX light rail trains and buses at 20…
The Utah CommuterLink Advanced Transportation Management System (ATMS) was developed so that operators in the Utah DOT Traffic Operations Center (TOC) could monitor and manage freeway and arterial…