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…
State DOTs would benefit from guidance that goes beyond the norm on how to conduct modeling for project-level air quality analyses and addresses which modeling inputs are the most cost-effective…
Traditionally, the main priority of winter road maintenance has been assigned to level of service, cost-effectiveness, and infrastructure corrosion rather than other less well-characterized effects such as impacts to water…
In most states, commitment to put a context-sensitive bridge in as a replacement for a historic bridge in a historic district is made without reference to known examples, design and…
Rehabilitation of historic metal truss bridges often involves the replacement of rivets in the original bridge. Insofar as the rivets are considered part of the historic fabric of the bridge,…
The traditional technique for addressing hydrologic impacts of highway projects is to construct detention basins. While the basins are effective at reducing peak flows and flood issues, they are less…
Chloride-based deicers continue to be the primary deicing chemical of choice due to the huge cost differential with non-chloride deicers. Essentially there are no salt alternatives that are comparable in…
There is a great interest in safe wildlife crossings for a number of reasons: reduced auto/animal collisions that cause economic loss, and physical harm or death to humans and animals.…
Develop a consistent methodology for analyzing noise impacts on different terrestrial species. Develop standard metrics and procedures for the DOTs to conduct noise analyses of our highway projects on wildlife,…
The US interstate highway system is essentially complete, and was constructed in large part without the benefit of stormwater quality features to improve highway runoff water quality or measures to…