Image below: Wildlife overpass (south), US Hwy 93, near Wells, Nevada, USA

Wildlife overpass (south), US Hwy 93, near Wells, Nevada, USAWildlife overpass (south), US Hwy 93, near Wells, Nevada, USA

Image below: Wildlife overpass (north), US Hwy 93, near Wells, Nevada, USA

Wildlife overpass (north), US Hwy 93, near Wells, Nevada, USAWildlife overpass (north), US Hwy 93, near Wells, Nevada, USA

For other images of wildlife overpasses (wildlife only) click here.

For images of multifunctional wildlife overpasses (wildlife, water, humans, non-motorized vehicles, motorized vehicles) click here.

For images of landscape bridges, road tunnels or very wide overpasses over longer road sections click here.

Click here for images of multifunctional underpasses.

Click here for images of wildlife underpasses.

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Dunes and mountains with motion, White Sands National Monument, New Mexico, USA

Dunes, White Sands National Monument, New Mexico, USADunes, White Sands National Monument, New Mexico, USA

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Dunes at sunrise with motion, White Sands National Monument, New Mexico, USA

Dunes, White Sands National Monument, New Mexico, USADunes, White Sands National Monument, New Mexico, USA

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Dunes, White Sands National Monument, New Mexico, USA

Dunes, White Sands National Monument, New Mexico, USADunes, White Sands National Monument, New Mexico, USA

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Road ecology blog: Night time road closure, Saguaro National Park, Arizona, USA. Road closed dusk to dawn

Night time road closure, Saguaro National Park, Arizona, USANight time road closure, Saguaro National Park, Arizona, USA. Road closed dusk to dawn

Night time road closure, Saguaro National Park, Arizona, USANight time road closure, Saguaro National Park, Arizona, USA. Road closed dusk to dawn

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Click here to view images of seasonal road closures.

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Camper van on Artist's Drive, Death Valley National Park, California

Artist's Drive, Death Valley National Park, CaliforniaArtist's Drive, Death Valley National Park, California

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Salt flats at Badwater Basin, Death Valley National Park, California, USA

Salt flats at Badwater Basin, Death Valley National Park, CalifoSalt flats at Badwater Basin, Death Valley National Park, California, USA. Lowest point in North America, 282 ft (86 m) below sea level.

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Restaurant La Posta, Mesilla, New Mexico, USA

Restaurant La Posta, Mesilla, New Mexico, USARestaurant La Posta, Mesilla, New Mexico, USA

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Photograper at first light, Jerome Walker, White Sands National Monument, New Mexico, USA

Jerome Walker, White Sands National Monument, New Mexico, USAJerome Walker, White Sands National Monument, New Mexico, USA

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Camper van on dirt road, Saguaro National Park, Arizona, USA

Camper van on dirt road, Saguaro National Park, Arizona, USACamper van on dirt road, Saguaro National Park, Arizona, USA Camper van on dirt road, Saguaro National Park, Arizona, USACamper van on dirt road, Saguaro National Park, Arizona, USA. High clearance vehicles only Camper van on dirt road, Saguaro National Park, Arizona, USACamper van on dirt road, Saguaro National Park, Arizona, USA Camper van on dirt road, Saguaro National Park, Arizona, USACamper van on dirt road, Saguaro National Park, Arizona, USA

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Road ecology blog: Rock lined drainage along a slope to reduce erosion, Saguaro National Park, Arizona, USA

Rock lined drainage along a slope to reduce erosion, Saguaro NatRock lined drainage along a slope to reduce erosion, Saguaro National Park, Arizona, USA

Rock lined drainage along a slope to reduce erosion, Saguaro NatRock lined drainage along a slope to reduce erosion, Saguaro National Park, Arizona, USA Rock lined drainage along a slope to reduce erosion, Saguaro NatRock lined drainage along a slope to reduce erosion, Saguaro National Park, Arizona, USA

Click here for more images of erosion and erosion control measures.

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Saguaro and prickly pear, Saguaro National Park, Arizona, USA

Saguaro and prickly pear, Saguaro National Park, Arizona, USASaguaro and prickly pear, Saguaro National Park, Arizona, USA

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Backcountry tent camping, White Sands National Monument, New Mexico, USA

Backcountry tent camping, White Sands National Monument, New MexBackcountry tent camping, White Sands National Monument, New Mexico, USA

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