Highway 75 road kills catch ITD’s eye
Agency researching ways
to reduce accidents
By GREGORY FOLEY
Express Staff Writer
With collisions between big-game animals
and state Highway 75 motorists seemingly on the rise, the Idaho Transportation
Department has commenced new research on how it can minimize the often dangerous
encounters.
Chuck Carnohan, ITD senior environmental
planner, said Monday that the state agency in 2004 and beyond would work to
determine how ITD and other agencies could limit collisions between game animals
and motor vehicles at several locations in the Wood River Valley.
"ITD is eagerly trying to find ways to
reduce these collisions," Carnohan said. "I have seen plenty of dead animals all
over the state and the Wood River Valley is no exception."
At issue is an apparent steady stream of
typically high-impact encounters between wild ungulates—particularly deer and
elk—and an ever-increasing number of motorists traveling on the 27-mile stretch
of Highway 75 between Timmerman Hill and Ketchum.
Carnohan said ITD officials, in
researching the environmental impacts of a proposal to widen Highway 75 through
most of the Wood River Valley, determined that they wanted to examine the issue
of highway road-kill incidents.
To begin the process, ITD and a consultant
earlier this month issued maps that identify four established road-kill "hot
spots" along Highway 75 in the Wood River Valley.
The four hot spots ITD will likely focus
its efforts on include areas throughout the Wood River corridor in proximity to
excellent game habitat. They are:
-
An expansive area adjacent to Peregrine Ranch, north of Hailey, where numerous
elk and deer routinely cross the highway.
-
A relatively small but problematic area between Bellevue and Glendale Road,
south of the city, where a population of some 80 to 100 elk reside.
-
A long stretch of busy highway between East Fork Road and Reinheimer Ranch,
south of Ketchum.
-
An approximately 1.5-mile expanse of highway immediately north of Bellevue,
between the city limits and the Woodside Light Industrial Park.
Carnohan said ITD identified the "hot
spots" after reviewing a rough set of numbers reflecting how many dead or
gravely injured animals ITD workers moved off the side of the highway in the
last year. He noted that ITD’s numbers are by no means scientific, primarily
because incidents that result in animals fleeing the accident scene or being
moved by other public agencies are not recorded.
"We don’t have any viable statistical
counts of the animals," he said. "We have done the best scientifically with the
numbers that we have."
A December 2003 ITD report estimates that
"about 30 to 50 mule deer and a few elk are annually killed" along the highway.
Carnohan said the incidents do not likely
have a significant impact on local game populations but do cause significant
human injuries and monetary losses.
Rob Robinson, an ITD maintenance foreman
based in Hailey, said the Peregrine Ranch area is a notoriously "bad spot." He
noted that ITD workers since July have removed "12 to 14 deer" and "5 to 6 elk"
from the area.
Robinson said a "field of feed, " or
alfalfa, growing on Peregrine Ranch attracts elk and deer to the east side of
the highway, while forested areas along the Big Wood River on the west side
provide cover and water.
Carnohan noted that he believes
development and sprawl can also encourage animal movement across highway
corridors, as some resident populations of ungulates are "pushed aside."
ITD in 2002 installed flashing signs to
warn motorists of the hazard in the Peregrine Ranch area. ITD officials,
however, noted this week that many motorists become accustomed to the signs over
time and simply ignore them.
Carnohan said ITD in the coming year will
study what specific measures can be applied to reduce road-kill incidents. The
potential use of bright signs, signs with blinking lights, posts with light
reflectors, underpasses, overpasses and various types of fences will all be
considered, he said.
The most promising alternative, Carnohan
said, might be a developing technology that could employ infrared light scanners
to notify oncoming motorists that an animal is in or near the road.
Fencing, used with or without game
underpasses or overpasses, would be difficult to employ along Highway 75 because
it could prohibit access from the scores of intersecting roads and driveways,
Carnohan said.
Because ITD will likely not commence any
project to widen the highway until 2008 or 2009, developing technologies could
be more viable before extensive action is taken.
Rob Morris, a state Fish and Game
conservation officer who patrols parts of Blaine County, said he believes many
injuries to humans and game animals could be avoided in the interim if motorists
slowed down in the identified problem areas.
"Speed is definitely the thing that gets
people into trouble on Highway 75," Morris said.