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A Study Evaluating Audio- and Image-Based In-Vehicle Warning Messages in Work Zones Found a 16.4 Percent Reduction in CO2 Emissions Using Mixed Messages Compared to a No Message Scenario.

METHODOLOGY This study tested three scenarios: (i) work zone with no audio or image warning system (NO MESSAGE), (ii) work zone with a voice warning system (VOICE MESSAGES), and (iii) work zone with…
Content type
Date Posted
02/29/2024

Driver Simulator Study Study Testing Different Human–Machine Interfaces (HMI) Found Vehicle Speed Reduced by up to 16 Percent Under Level Three Automation After Takeover.

METHODOLOGY A driving simulator study was conducted in which two groups of drivers experienced one of two different HMI designs. One group experienced a Staged HMI design including a two-stage…
Content type
Date Posted
02/28/2024

Field Driving Study in India Showed Statistically Significant, Up to 64.3 Percent Reduction in Lane Departure Warnings Across All Age Groups with Active Lane Departure Assistance.

METHODOLOGY The test vehicle used in this study was an instrumented passenger car equipped withADAS, a Global Positioning System, and lasers. During the FOT, the participants completed 60 trips, 30…
Content type
Date Posted
02/29/2024

Microsimulation of A Signalized Intersection in Florida Estimated that Connected Vehicles Can Reduce Travel Times by up to 17 Percent at Full Penetration Due to Increased Likelihood of Arriving-On-Green.

METHODOLOGY The study leveraged the existing application programming interface (API) capabilities of the traffic simulation tool to emulate the CAV operations. Three simulation cases were considered…
Content type
Date Posted
01/29/2024

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

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

An Active Safety-Collision Warning Pilot in Washington State Estimated a Potential Upper Bound of Annual Total Net Benefits Between $1.1M and $2.1M Due to Prevention of Collisions with Vehicles, Pedestrians, and Bicyclists.

METHODOLOGY The first phase of this project involved equipping 38 transit buses with the CAWS. The buses traveled 352,129 miles during 23,798 operating hours from April 1, 2016 to June 30, 2016.…
Content type
Date Posted
10/30/2023

Anticipate Potential Additional Deployment Time Required for Registering On-Board Units with the Security Credential Management System for Cybersecurity.

Anticipate potential additional deployment time required for registering on-board units (OBU) with the SCMS for cybersecurity. While the SCMS offers a secure and privacy-preserving method for V2X…
Content type
Date Posted
10/30/2023

Add Auditory-Warning Systems to AV Shuttles to Ensure Pedestrian Safety, Especially for the Visually Impaired, Based on Lessons from the 2020 Tokyo Paralympic Games.

Lessons learned can be synthesized from media reporting as follows:  Add auditory-warning systems to AV Shuttles and consider additional human oversight for increased safety. After the incident…
Content type
Date Posted
07/25/2023

Enhance Understanding of Advanced Driver Assistance Systems Usage and Activation in Different Scenarios by Incorporating Additional Data Sources, such as Vehicle-Based Telematics.

Enhance understanding of ADAS usage and activation in different scenarios by incorporating additional data sources, such as vehicle-based telematics. This study utilized crash and vehicle…
Content type
Date Posted
05/26/2023