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Simulation of Connected and Automated Vehicle Applications Shows That Up to 30 Percent More Traffic Demand Can Be Satisfied with Bundled Cooperative Adaptive Cruise Control, Speed Harmonization, and Cooperative Merge at High Market Penetration.

Methodology Researchers conducted a case study based on a 13-mile segment of I-66, between the I–495 interchange and US 29 interchange. Speed and volume data, on- and off-ramp traffic volume data,…
Content type
Date Posted
09/27/2021

High Occupancy/Toll System in Northern Virginia Improves Both Travel Time and Travel Time Reliability.

A research group at University of Maryland studied the effects of HOT tolling on the I-66 corridor. The team first gathered a robust mix of data sets such as toll data, probe speed data, and…
Content type
Date Posted
03/20/2021

Cooperative Adaptive Cruise Control (CACC) and Dynamic Speed Harmonization (DSH) applications that share dedicated lanes with HOVs can improve throughput by 21 percent with 10 percent market penetration.

FINDINGS The figure below extracted from the source document shows a comparison of the maximum dedicated lane throughput achieved through CACC implementation at different levels of market…
Content type
Date Posted
10/30/2018

Cooperative Adaptive Cruise Control (CACC) and Dynamic Speed Harmonization (DSH) applications that share dedicated lanes with HOVs can reduce fuel consumption by more than 16 percent.

FINDINGS The figure below extracted from the source report shows traffic speed profiles on I-66 (WB) and the potential for reduced traffic shockwaves when DSH is combined with CACC at market…
Content type
Date Posted
10/30/2018

Simulation of an ATM monitoring system successfully demonstrates ability to avoid the severe consequences of cyberattacks, indicating significant potential to improve freeway operations.

When considering the use of camera phones in managing incidents, be aware of the challenges associated with technology interoperability among agencies and first responder priorities.

Throughout the camera phone pilot phase, first responders captured images of incidents and forwarded them to towing companies so that the appropriate size/type of recovery vehicle could be dispatched…
Content type
Date Posted
04/18/2007

Conduct rigorous testing prior to deployment of an emergency preemption system to avoid potential problems and negative system impacts.

By providing emergency vehicles (EV) with a green light on their approach to a signalized intersection throughout the length of their run, a jurisdiction can reap substantial benefits. Not only does…
Content type
Date Posted
04/21/2006

Identify a single agency to be responsible for maintenance of an emergency vehicle preemption system.

An Emergency Vehicle Preemption (EVP) system involves many different stakeholders who may not typically communicate except during major incidents. These stakeholders will include police, fire and…
Content type
Date Posted
04/21/2006

Plan for system redundancies to ensure appropriate incident response activities and continuity of operations during emergency situations.

To support emergency response efforts in a major crisis, redundancy should be built into systems so that appropriate incident response activities and continuity of operations could be ensured. The…
Content type
Date Posted
04/13/2006

Provide a single message to the public to assure consistency and to correct inaccurate crisis information.

When responding to a crisis, accurate information is essential to ensure that rumors and inaccurate information do not contribute to public confusion and hamper the management of the emergency…
Content type
Date Posted
04/13/2006

The projected operating costs for a regional smartcard financial clearing center totaled less than $4 million per year.

The Northern Virginia Transportation Commission worked closely with the Washington Metropolitan Area Transit Authority (WMATA) to develop a Regional Software Maintenance Agreement (RSMA). The…
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Made Public Date
07/31/2008