Transportation agency managers have expressed concern that reduced mowing practices, such as those that benefit pollinators, may increase vehicle collisions with large mammals like deer, thereby reducing driver safety. Though…
Transportation-related infrastructure affects wildlife in a variety of ways by altering the physical environment. These alterations often negatively impact wildlife through displacement, barriers to movement, and increased mortality. They can…
Background Roadway lighting has been shown to measurably reduce nighttime fatal and other crashes. However, roadway lighting can negatively impact insects and animals through attraction and disorientation or by disrupting…
Recent research findings identified 6PPD-quinone as the major agent responsible for exceptionally high levels of rapid mortality of adult Coho salmon in some urban streams. Lethal effects occurred in Coho…
TERI Administrator Note (February 2009): Project cross-referenced in TRB Research Needs Database. Not recommended at present time by 2009 Air Quality Subcommittee. The first goal of this project is to…
Highways create a multitude of impacts on wildlife movement across the landscape. Some of the highway impacts result from the structure of the roadway, location of the roadway, traffic volume,…
Over the last decade, natural resource agencies and transportation agencies have become increasingly aware of the effects that highway and railroad systems have on wildlife. Habitat loss and fragmentation are…
I. Research Problem Statement: Erosion (runoff) and sedimentation of and from low-volume roads can adversely impact the environment. Many low-volume roads are soil or aggregate surfaced, have steeper grades than…
Transit system capital efficiency is often criticized due to low ridership and high capital costs, combining to limit competitive economic application of this transportation mode. The relatively low volume of…
TERI Administrator Note – Selected as NCHRP 25-39 (FY12 Program) RESEARCH PROBLEM STATEMENT Transportation performance management is a well established and effective practice for establishing accountability and driving results…