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Conduct Yearly Solar Panel Maintenance Including Surface Cleaning and Charging Output Tests When Using Solar Powered Intelligent Warning Devices

Conduct yearly solar panel reviews including surface cleaning and charging output tests when using any solar powered systems. While these systems often use maintenance-free batteries, it is…
Content type
Lesson
Date Posted
01/31/2024
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), Speed Warning and Enforcement (TM17), Vulnerable Road User Safety (VS12)
Geolocation links
Minnesota, United States

Automated Speed Enforcement Decreased Crashes by 36 Percent from 2019 to 2021 on Roosevelt Blvd in Philadelphia, While Falling Only Six Percent Citywide.

METHODOLOGY Before-and-after analysis (2019 vs 2021) was conducted to determine the effectiveness of the ASE implementation. To isolate the results of this intervention versus other factors, crash…
Content type
Benefit
Date Posted
06/29/2023
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17)
Geolocation links
Philadelphia, Pennsylvania, United States

Simulation Results Revealed a V2I-based Speed Advisory System Increased the Minimum Time to Collision by an Average of 1.2 Seconds.

METHODOLOGY This study examined the effects of varying levels of SAS MPR (0%, 25%, 50%, 75%, 100%) on rear-end collision risks. Real vehicle trajectories, vehicle lengths, and signal timing were…
Content type
Benefit
Date Posted
03/24/2023
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Atlanta, Georgia, United States

A Dynamic Speed Feedback Sign (DSFS) is Most Effective at Reducing Vehicle Speeds on a Freeway Ramp When the Sign is Placed 250 Feet After the Start of the Ramp Curve.

Ensure a minimum of 250 feet radar activation range. This study found strong sign-related effects associated with the radar detection range. With the DSFS installed near the start of the curve, the…
Content type
Lesson
Date Posted
09/16/2022
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17)
Geolocation links
Michigan, United States

Artificial Intelligence based Roadway Safety and Work Zone Detection Technology in Nevada Uncovered 20 Percent More Crashes Than Previously Reported and Reduced Crash Response Times by Nine to Ten Minutes on Average.

METHODOLOGY The AI platform was used to analyze real-time data collected from a variety of sources including in-vehicle navigation devices, road-side traffic detectors, a smartphone navigation app…
Content type
Benefit
Date Posted
04/21/2022
Taxonomy (ARC-IT) Work Zone Management (MC06), Work Zone Safety Monitoring (MC07), Emergency Call-Taking and Dispatch (PS01), Emergency Response (PS02), Speed Warning and Enforcement (TM17)
Geolocation links
Nevada, United States

Modify Boundaries by Direction and Use High Resolution GPS to Create Better Geo-Fencing for School Zone Speed Monitoring Mobile Applications.

Modify school zone boundaries by direction and use high resolution GPS for higher lane-level precision to prevent false alerts. School zone boundaries are generally staggered in two directions (the…
Content type
Lesson
Date Posted
10/26/2021
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Transit Pedestrian Indication (PT11), Dynamic Roadway Warning (TM12), Vulnerable Road User Safety (VS12)
Geolocation links
Gainesville, Florida, United States

New York City’s Speed Camera Program Costs over $164 Million Including an Operating Cost of $104 Million During Fiscal Year 2014 to 2019.

Speeding is a leading cause of fatal traffic crashes. As part of its Vision Zero initiative,  the New York City Department of Transportation (NYC DOT) implemented a speed camera program, which…
Content type
System Cost
Made Public Date
07/27/2021
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Transit Pedestrian Indication (PT11), Dynamic Roadway Warning (TM12), Vulnerable Road User Safety (VS12)
Geolocation links
New York, United States

A New York City Speed Camera Program Reduced Speeding at 91 School Speed Zones by 73 Percent.

METHODOLOGY The average weekly number of speeding violations from 91 fixed speed zone cameras installed after Summer 2019 was investigated. A before-and-after analysis using data from 95 school speed…
Content type
Benefit
Date Posted
07/27/2021
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Transit Pedestrian Indication (PT11), Dynamic Roadway Warning (TM12), Vulnerable Road User Safety (VS12)
Geolocation links
New York, United States

Speed Feedback Signs Manage to Reduce Mean Speed by up to 2.9 km/h in European Urban Environment.

Content references source material no longer available at its original location.
For the study, speed display signs were installed along busy and quiet streets in two Finnish cities. Each of these signs displayed the driver’s speed and a graphic symbol that varied…
Content type
Benefit
Date Posted
11/24/2020
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Infrastructure-Based Traffic Surveillance (TM01), Integrated Decision Support and Demand Management (TM09)
Geolocation links
Finland
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