Fencing combined with wildlife over and underpasses in Banff National Park have reduced wildlife-vehicle collisions by 80%. Image: Karsten Heuer
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“The 40+ wildlife crossings built on U.S. Highway 93 on the Flathead Reservation of western Montana is the largest highway mitigation effort in the U.S. Support from Y2Y has helped share the successes (and engaging wildlife photos) of the U.S. 93 monitoring and science program.”


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(Watch the Highway Wilding 23-minute documentary to learn more about the efforts Y2Y and its partners are taking to make our roads safer for people and animals.)


Bear running across road. Image: Kent Nelson
Wildlife must navigate across busy roads to continue their journey. Image: Kent Nelson
How did the grizzly bear, or the pronghorn, or the salamander cross the road safely? That is a question that Y2Y asks.


Roads, and in particular highways, as well as trains, are significant barriers to wildlife movement throughout the Yellowstone to Yukon region. Even in protected areas like Banff, Yoho and Kootenay national parks wildlife collisions on roads are an issue. In 2012, 12 grizzly bears were struck in the parks by motorists on roads with no form of wildlife-crossing structures. Another four were killed by trains. 2014 saw another two grizzlies taken out by the train.These barriers not only threaten the lives of people, but if wildlife cannot cross roads and connect to other populations it limits their genetic diversity, which will lead to long-term population decline.


Banff Overpass. Image Josh Whetzel
Wildlife structures through Banff National Park have reduced wildlife-vehicle collisions by 80%. Image: Josh Whetzel
Many measures to keep wildlife and people moving safely have had extraordinary results. Research conducted on fencing, as well as the wildlife over- and underpasses, built on Canada’s Trans-Canada Highway through Banff National Park shows that these structures have reduced wildlife-vehicle collisions in the park by 80 per cent. Additionally, these structures have enabled more than 140,000 animal crossings, which have proven to promote gene flow.

Other measures, such as movable remotely-triggered wildlife signs, are effective at alerting drivers to slow down to the presence of wildlife. This measure is highly effective for roads that are lined with private dwellings and drive-ways, which makes adding fencing and crossing structures impractical. These are just a few examples of many mitigation options.


As of 2013, some 1,000 miles (1,600 km) of highways across Alberta, Idaho, Montana and Wyoming are or are in the process of being modified to be safer for both wildlife and people thanks to the work of Y2Y and its partners. Despite this, there are thousands of miles of highway and railway line that threaten both people and wildlife. Y2Y is focused on tackling each of these barriers, one at a time.

Highway Projects Oct 3, 2016



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Alberta Environment and Parks, Alberta Transportation, American Wildlands, Annatum Ecological Consulting, BC Hydro Fish and Wildlife Compensation Program, BC Conservation Foundation, Bridger Teton National Forest, Caribou Targhee National Forest, Miistakis , Center for Large Landscape Conservation, Great Northern Environmental Stewardship Area, Greater Yellowstone Coalition, Idaho Department of Fish and Game, Idaho Master Naturalists, Jackson Hole Conservation Alliance,  Jackson Hole Wildlife Foundation, National Fish and Wildlife Foundation, Peoples’ Way Partnership, Road Watch in the Pass, The Nature Conservation, The Teton Conservation District,  University of Northern BC, Valhalla Wilderness Society, Volker Stevin, Western Transportation Institute and The Wildlife Conservation Society. 

Related Information:

Fencing and Wildlife Crossing Structures

Banff Wildlife Crossing Structures

Central Canadian Rocky Mountains

Cabinet-Purcell Mountain Corridor

Crown of the Continent


GET THE LATEST: Transportation News

Environmental group wants to reduce speed limit along highway

— Posted on Mar 21, 2019 07:53 AM in: Y2Y in the News
Environmental group wants to reduce speed limit along highway

Y2Y suggests interim changes to speed limits on a section of the Trans-Canada Highway near Banff National Park following a number of wildlife-vehicle collisions there. | Rocky Mountain Outlook, Mar. 21, 2019

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Conservation groups raise concerns about rail link between Banff and Calgary

— Posted on Mar 06, 2019 08:59 AM in: Y2Y in the News
Conservation groups raise concerns about rail link between Banff and Calgary

Y2Y among the Alberta wildlife and conservation groups raising concerns about the possibility of passenger rail between Calgary and Banff, saying it may pose a danger to animals in the area. | The Star Calgary, Mar. 4, 2019

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Calls for additional wildlife crossings east of Canmore to curb fatal crashes

— Posted on Sep 06, 2018 09:37 AM in: Y2Y in the News
Calls for additional wildlife crossings east of Canmore to curb fatal crashes

Advocates are calling for wildlife overpasses along the Trans-Canada Highway east of the Banff Park gates. | CTV Calgary, Sept. 4, 2018

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Fremont voters to advise on wildlife overpasses

— Posted on Aug 14, 2018 08:05 AM in: Y2Y in the News
Fremont voters to advise on wildlife overpasses

An advisory vote on possible wildlife mitigation alternatives for improvement to the section of Idaho's U.S Highway 20 near the Montana border. | Idaho Falls Post-Register, Aug. 10, 2018

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Wildlife overpass design to go ahead

— Posted on Apr 09, 2018 11:45 AM in: Y2Y in the News
Wildlife overpass design to go ahead

The province has dollars to hire a consultant to do the design and cost benefit analysis of a crossing between Highway 1X and Lac Des Arcs. | Rocky Mountain Outlook, Apr. 5, 2018

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