Project funding: National Park Service/Saguaro National Park Total funds: $50,000 Project Period: 1994-2001 In an attempt to understand the effects that roads were having on wildlife in Saguaro National Park, weekly wildlife mortality surveys were conducted from 1994-1999. From our survey data and additional data collected on scavenging rates, obse...
When islands are connected to the mainland by bridges or tunnels it becomes possible not only for humans to travel back and forth but also for wildlife, which uses these new means of access as migration corridors. The results can be disastrous, as can be seen from the example of the island of Tautra in the north of Norway (North Trøndelag).Tautra w...
Roads constitute a direct and often permanent loss of wildlife habitat; they can serve as physical or psychological barriers to animal movements, and are often the source of exceedingly high levels of animal mortality. Our goal was to better understand the effects of roads on amphibian populations in a planned landscape corridor in southern Califor...
The migratory route of the Wyoming Range mule deer (Odocoileus hemionus) herd is bisected by U.S. Highway 30 between Kemmerer and Cokeville, Wyoming, resulting in hundreds of deer-vehicle collisions at this site each year. We tested the effectiveness of the FLASH system, designed to detect deer presence on the highway and warn motorists by triggeri...
This paper presents a standard list of procedures for designing natural fish passage structures in urban streams. Before any design can commence, designers need to thoroughly investigate the target fish species and the hydrology of the study reach. Designs of riffle grade controls (RGCs) and flow constrictor/step pools (FC/SPs) start with topograph...
Previous research on response by grizzly bears to roads has been confined to interactions with tertiary or unimproved road systems. To our knowledge no information exists to evaluate the potential of high-speed, high-volume highways to disrupt or prevent grizzly bear movement. We know of no other area within occupied grizzly bear habitat in North A...
Over the past year, the Washington State Department of Transportation (WSDOT) has sponsored a process improvement team to improve the way the department conducts NEPA environmental review processes. A primary focus of this effort has been to reduce the likelihood that decisions made during the process will be revisited or discarded later in the pro...
In this paper, we offer an option for streamlining the National Environmental Policy Act (NEPA) of 1969 process for roadway projects. Section 1309 of the Transportation Equity Act for the 21st Century addresses concerns relating to delays in implementing roadway projects and directs federal agencies to streamline the environmental review process. O...
The fragmentation of carnivore habitat in the Rocky Mountains on both sides of the U.S.-Canada border is an ongoing threat to the survival and recovery of these populations. Human developments are the cause of this fragmentation. Major developments causing fragmentation include private land conversion into homesites and highway construction and imp...
Problem Statement Jasper National Park (JNP) is located on the East slope of the Canadian Rockies in the province of Alberta, Canada. Two national transportation corridors, the Yellowhead Highway and the Canadian National Railway, each pass through the park. These transportation corridors parallel each other and are located in prime wildlife habita...
