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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
Date Posted
01/31/2024

Driving Simulation Study on V2I Technologies Found Audio Warnings Effective in Reducing Driver Speed by Approximately 11.4 Percent.

METHODOLOGY In this study, four specific scenarios were tested in driver simulation: (i) BASE: Heavy rain without warning, (ii) AUDIO: Heavy rain with in-vehicle audio warning, (iii) SCREEN: Heavy…
Content type
Date Posted
12/27/2023

Advanced Queue Detection Systems Installed at Four Work Zones in Nebraska Were Estimated To Cost $166,225 per Work Zone for a 6-Month Project on I-80.

Cost Subsystem
The system cost analysis was based on a typical AQD system including one CCTV camera, three non-intrusive detection, and two pairs (total of four) of PDMS. Based on an estimation of six-month…
Content type
Made Public Date
12/22/2023

Australian Study on Cooperative ITS Technologies Showed a Four to Nine Percentage Point Increase in Technology Usefulness Rating, Based on User Questionnaires Comparing Control and Treatment Groups.

METHODOLOGY The participants were randomly assigned into either of two groups: Treatment Group that had an HMI receiving warnings, and Control Group that had an inactive HMI. Over nine months, both…
Content type
Date Posted
12/18/2023

University of Florida Study of Leading Pedestrian Indicator (LPI) Implementation Found a Range of 25 to 100 Percent Reduction in Vehicle-Pedestrian Conflicts at Test Locations.

Methodology Preliminary LPI implementation guidelines were developed after input was collected among experienced traffic engineers and FDOT District representatives through surveys, interviews, and…
Content type
Date Posted
11/28/2023

Empirical Study in Florida Found That Signal Retiming Effectively Reduced Average Travel Time on Arterial Roads by Over 40 Percent for Traffic Entering Sporting Events, but Not so Much After the Events.

METHODOLOGY In this study, traffic volumes were collected from loop detectors installed by the Lee County Department of Transportation (Lee DOT) while travel time was determined from Bluetooth…
Content type
Date Posted
06/30/2023

Advanced Queue Detection System Using Portable Dynamic Message Signs Reduced Speeds of Vehicles Approaching Interstate Work Zones in Nebraska by up to Seven Miles Per Hour.

METHODOLOGY In this study, portable traffic data capturing units, consisting of cameras and Wi-Fi receivers as detectors, were utilized through a private company. Cameras within the portable units…
Content type
Date Posted
06/30/2023

Leveraging Variable Message Signs (VMS) and Adaptive Signal Control to Inform and Regulate Travelers Reduced 10 to 20 Percent Peak Time Traffic for Central London During Olympics Game Event.

METHODOLOGY A dedicated 109-mile Game Lane route (Olympic Route Network [ORN]) was established for the Olympic Games, connecting Heathrow Airport to the main event sites in central and east London.…
Content type
Date Posted
06/30/2023

Investment of 200 Solar Powered Portable Dynamic Message Signs Providing Information on Road Conditions and Special Olympic Route Network Traffic Lanes Cost $1.92 Million for the 2012 London Olympics.

Dynamic Message Signs (DMSs) are commonly used to communicate specific information to travelers regarding traffic conditions. DMS plays an important role during special events such as the Olympic…
Content type
Made Public Date
06/28/2023

Place Queue Trucks Ahead of a Work Zone to Reduce Number of Hard Braking Events and Crash Risks.

Use in-vehicle alerts to complement roadside signs. Alerts displaying the driver’s current travel speed compared to the posted speed limit may lead to a reduction in speed, increasing traffic…
Content type
Date Posted
03/25/2022