This study would be a follow-up to the 2008 NCHRP study on post-World War II housing and specifically focus on identifying strategies employed by state DOTs to manage the exponential…
Every year more than 22 million tons of salt (primarily NaCl) and other de-icing agents are applied to U.S. roads to maintain safe driving conditions in inclement weather. These chemicals…
Bridge maintenance along with traffic, weather, and other related activities are continuous sources of pollution for the water bodies under the bridge. In Virginia, where are more than 10,000 bridges,…
RESEARCH PROBLEM STATEMENT Interstate highway improvement projects that are deemed to have traffic noise impacts result in near-road barrier walls being constructed or expanded. Although the barriers are designed and…
Noise Barrier Maintenance Costs: the scope of the project consists of surveying state DOTs to determine the annual (or periodic) maintenance costs of noise barriers (by material type). The results…
The purpose of this research is to evaluate dispersion models and understand their current limitations using data collected from tracer studies conducted at locations with complex real-world traffic flow patterns.…
A number of states have established goals for reducing GHG emissions from the transportation sector but many suggested changes are outside the jurisdiction of State DOTs (efficiency standards, land-use, etc.). …
Research Idea Scope: Background: Petroleum hydrocarbon pollutants are present in stormwater runoff at most transportation facilities, and reducing their levels is a common requirement in National Pollutant Discharge Elimination System…
Unmanned Aircraft Systems (UAS) have garnered a great deal of interest in the transportation community. This proposed research will examine the use of UAS for environmental risk assessment and environmental…
The Congestion Management and Air Quality Improvement Program (CMAQ) has existed since 1991 providing benefits by reducing air pollution. This program has evolved over the years and will be entering…