Content that references this location
Field Study Using Speed Trailer With Red and Blue Lights Resulted in Over 50 Percent Speed Reduction in a Work Zone in the St. Louis Region During Daytime and Nighttime.
METHODOLOGY
A field study was conducted to collect and analyze approximately four weeks of data from a work zone on I-270 westbound, spanning from the Lindbergh Boulevard interchange to Dunn Road…
Content type
Date Posted
03/31/2023
Geolocation links
In St. Louis County, Missouri, full closure of portions of I-64 for two years allowed for an accelerated construction schedule, saving taxpayers between $93 million and $187 million.
Findings
By diverting 98,000 to 120,000 vehicles daily to alternative routes for two years, the impact costs over the normal operational state were $101.5 million.
Had a partial closure system…
Content type
Date Posted
01/02/2013
Taxonomy (ARC-IT)
Traffic Information Dissemination (TM06),
Integrated Decision Support and Demand Management (TM09),
Personnel Device Maintenance (SU13),
Personalized Traveler Information (TI02),
Trip Planning and Payment (TI04),
Broadcast Traveler Information (TI01)
Geolocation links
A Variable Speed Limit (VSL) system on the I-270/I-255 loop around St. Louis reduced the crash rate by 4.5 to 8 percent, due to more homogenous traffic speed in congested areas and slower traffic speed upstream.
METHODOLOGYPost-VSL deployment data from four segments on I-270 during peak periods was used to evaluate mobility outcomes of VSL. To understand operations under virtual pre-VSL operations, the…
Content type
Date Posted
09/20/2011
Taxonomy (ARC-IT)
Variable Speed Limits (TM20)
Geolocation links
The St. Louis Motorist Assist program had a benefit-cost ratio of 38.25:1, with annual secondary crashes lowered by 1,082 and annual congestion costs lowered by $1,130,000.
METHODOLOGYThe benefit-cost analysis used safety data from incidents that occurred from the years 2000-2008 on seven freeways in the metro St. Louis area. The analysis used data that law enforcement…
Content type
Date Posted
04/26/2011
Taxonomy (ARC-IT)
Roadway Service Patrols (PS08)
Geolocation links
Deploy arterial travel time detection systems incrementally to allow time to identify issues and fine-tune performance.
LESSONS
Chandler, AZ (Bluetooth deployment)
This technology uses a wireless Bluetooth reader to communicate with in-vehicle devices programmed to pair with other Bluetooth devices. Matching…
Content type
Date Posted
11/30/2014
Taxonomy (ARC-IT)
Infrastructure-Based Traffic Surveillance (TM01),
Integrated Decision Support and Demand Management (TM09)
Geolocation links
The service patrol program in St. Louis had operating costs of $2,015,378 in 2008, and operating costs of $2,075,839 in 2009.
Motorist Assist is a freeway service patrol program covers all freeway segments in the St. Louis metro area. Initially deployed in 1993 as part St. Louis's overall ITS deployment, Motorist Assist was…
Content type
Made Public Date
04/26/2011
Taxonomy (ARC-IT)
Roadway Service Patrols (PS08)
Geolocation links
INTELLIGENT TRANSPORTATION SYSTEMS JOINT PROGRAM OFFICE
1200 New Jersey Avenue, SE
Washington, DC 20590
