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Vision-based Site Monitoring System Deployed at Six Exit Ramps in Sacramento Revealed a 53 Percent Reduction in the Wrong-Way Event Rate.

METHODOLOGY The VBSM system utilizes an integrated, outdoor-ready network camera, with a built-in processor to support on-board analytics for WWD detection and traffic volume counter, along with…
Content type
Benefit
Date Posted
07/25/2023
Taxonomy (ARC-IT) Infrastructure-Based Traffic Surveillance (TM01)
Geolocation links
Sacramento, California, United States   |   San Diego, California, United States

Naturalistic Experiment in California Found Fully Automated Vehicles Increased Households' Vehicle Miles Traveled by 60 Percent, but that Overall Shifts Towards Car-Dependent Travel are Undesirable.

METHODOLOGY In this study, 43 households were selected from a sampling frame of 4,010 households that had previously participated in a travel survey and agreed to be contacted for follow-up studies.…
Content type
Benefit
Date Posted
05/26/2023
Taxonomy (ARC-IT) Automated Vehicle Operations (VS16)
Geolocation links
Sacramento, California, United States

Field Testing of Coordinated Ramp Metering on a California Highway Resulted in an Average of 7.25 Percent Increase in Ratio of Vehicle Miles Travelled to Vehicle Hours Travelled During the AM Peak Hours, Indicating Traffic Improvement.

METHODOLOGY After fine-tuning the CRM algorithm using a microscopic simulation of the test site, the research team worked closely with California DOT (Caltrans) for (a) refining the Concept of…
Content type
Benefit
Date Posted
10/29/2021
Taxonomy (ARC-IT) Emissions Monitoring (ST01), Eco-Traffic Metering (ST03), Traffic Metering (TM05)
Geolocation links
Sacramento, California, United States

Alternative Work Zone Intrusion Alarm (WZIA) Systems in California Range in Cost from $4,630 to $11,100 per Half-Mile.

A work zone intrusion alarm (WZIA) system was tested to improve the safety of the current Caltrans Standard Plans for traffic control in work zones in Sacramento, California. The objective of this…
Content type
System Cost
Made Public Date
09/28/2021
Taxonomy (ARC-IT) Incident Scene Safety Monitoring (PS07), In-Vehicle Signage (TI07), Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01), Reduced Speed Zone Warning / Lane Closure (VS09), Work Zone Safety Monitoring (MC07)
Geolocation links
Sacramento, California, United States

An Evaluation of Three Work Zone Intrusion Alarm Systems in California Provided Suggestions to Enhance Visual, Sound, and Sensor Components.

The lessons learned from the project are summarized for the WZIA systems evaluated.  Provide a visual alert and include multiple speakers and volume control to improve sound levels in all…
Content type
Lesson
Date Posted
09/28/2021
Taxonomy (ARC-IT) Incident Scene Safety Monitoring (PS07), In-Vehicle Signage (TI07), Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01), Reduced Speed Zone Warning / Lane Closure (VS09), Work Zone Safety Monitoring (MC07)
Geolocation links
Sacramento, California, United States

Survey on Roadway Worker Protection Warning Device in Sacramento Shows 83 Percent of Rail Transit Agency Employees Felt Safer with the Device.

  Methodology System effectiveness, including unusual occurrences or comments and system acceptance, was measured in terms of work zone intrusion rates and employee survey responses. Unusual…
Content type
Benefit
Date Posted
07/21/2021
Taxonomy (ARC-IT) Incident Scene Safety Monitoring (PS07), In-Vehicle Signage (TI07), Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01), Reduced Speed Zone Warning / Lane Closure (VS09)
Geolocation links
Sacramento, California, United States

Sacramento Regional Transit District Implements a Roadway Worker Protection System for a Total System Cost of $861,592.

Through partnership with the Federal Transit Administration (FTA), the Sacramento Regional Transit District (SacRT) conducted a demonstration test of a secondary warning device for roadway…
Content type
System Cost
Made Public Date
07/21/2021
Taxonomy (ARC-IT) Incident Scene Safety Monitoring (PS07), In-Vehicle Signage (TI07), Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01), Reduced Speed Zone Warning / Lane Closure (VS09)
Geolocation links
Sacramento, California, United States

Avoid Using Roadway Worker Protection Warning Devices in City Centers or in Small Areas with Multiple Tracks, as Train Indications May Be More of a Nuisance than Helpful to Frontline Workers.

Technical issues with the warning device suggested a wide range of lessons learned during the project, summarized below: Understand that the use of electronic devices in active trackway could be a…
Content type
Lesson
Date Posted
07/21/2021
Taxonomy (ARC-IT) Incident Scene Safety Monitoring (PS07), In-Vehicle Signage (TI07), Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01), Reduced Speed Zone Warning / Lane Closure (VS09)
Geolocation links
Sacramento, California, United States

A Case Study Estimated That With a 40 Percent CACC Market Penetration Rate Traffic Would Flow at Higher Speeds on SR 99 in California.

METHODOLOGY This case study used microscopic traffic simulation models to depict the impacts of CACC. The modeling framework was based on a state-of-the-art human-driver model and an adaptive cruise…
Content type
Benefit
Date Posted
04/30/2021
Taxonomy (ARC-IT) Connected Eco-Driving (ST09), Infrastructure Enhanced Cooperative Adaptive Cruise Control (VS15), Automated Vehicle Operations (VS16), Cooperative Adaptive Cruise Control (VS14)
Geolocation links
Sacramento, California, United States

Archived data management systems benefit planning and decision-making within agencies

BenefitsThe data collection and archival characteristics of ADMS are keys to the benefits identified through the case studies. These benefits are:Improved planningImproved policy decision-…
Content type
Benefit
Date Posted
02/09/2016
Taxonomy (ARC-IT) ITS Data Warehouse (DM01), Data Distribution (SU03), Map Management (SU04), Object Registration and Discovery (SU06), Management of Electronic Traffic Regulations (METR) (VS17), Maintenance and Construction Activity Coordination (MC08), Regional Traffic Management (TM07), Integrated Decision Support and Demand Management (TM09), Weather Information Processing and Distribution (WX02)
Geolocation links
Phoenix, Arizona, United States   |   Sacramento, California, United States   |   Detroit, Michigan, United States   |   St. Paul, Minnesota, United States   |   Seattle, Washington, United States
ITS Deployment Evaluation

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