E X P E R I E N C E Y O U R A M E R I C AE X P E R I E N C E Y O U R A M E R I C A

Safety and AestheticsSafety and AestheticsMissouri Traffic and Safety ConferenceMissouri Traffic and Safety Conference

May 2009May 2009

National Park ServiceNational Park ServiceU.S. Department of the InteriorU.S. Department of the Interior

Denver Service Center, Transportation DivisionDenver Service Center, Transportation Division

Treff AlexanderLandscape Architect

“…“…to conserve the scenery and the to conserve the scenery and the natural and historic objects and wild life natural and historic objects and wild life therein and to provide for the therein and to provide for the enjoyment of the same in such manner enjoyment of the same in such manner as will leave them unimpaired for the as will leave them unimpaired for the enjoyment of future generations.”enjoyment of future generations.”

-Organic Act, 1916-Organic Act, 1916

Going-to-the-Sun RoadGoing-to-the-Sun RoadGlacier National Park, MTGlacier National Park, MT

Natchez Trace Parkway, TNNatchez Trace Parkway, TN

Going-to-the-Sun RoadGoing-to-the-Sun RoadGlacier National Park, MTGlacier National Park, MT

Newfound Gap RoadNewfound Gap RoadGreat Smoky Mountains NP, TN/NCGreat Smoky Mountains NP, TN/NC

Slope sculpting,Slope sculpting,Foothills Parkway, TNFoothills Parkway, TN

Hydroseeding and seedling planting,Hydroseeding and seedling planting,Foothills Parkway, TNFoothills Parkway, TN

Fill slope construction,Fill slope construction,Foothills Parkway, TNFoothills Parkway, TN

Aggregate / topsoil mix and straw matting, hydroseeded,Aggregate / topsoil mix and straw matting, hydroseeded,Foothills Parkway, TNFoothills Parkway, TN

Going-to-the-Sun RoadGoing-to-the-Sun RoadGlacier National Park, MontanaGlacier National Park, Montana

Historic headwall,Historic headwall,Great Smoky Mountains NP, TNGreat Smoky Mountains NP, TN

Steel-backed timber guardrail,Steel-backed timber guardrail,Great Smoky Mountains NP, TN/NCGreat Smoky Mountains NP, TN/NC

Historic retaining wall and guardwall,Historic retaining wall and guardwall,Great Smoky Mountains NP, TN/NCGreat Smoky Mountains NP, TN/NC

Damaged guardwall,Damaged guardwall,Great Smoky Mountains NP, TN/NCGreat Smoky Mountains NP, TN/NC

Guardwall in good condition,Guardwall in good condition,Glacier National Park, MontanaGlacier National Park, Montana

Baltimore – Washington Parkway, MDBaltimore – Washington Parkway, MDParson Branch Rd, Great Smoky Mountains NP, TN/NCParson Branch Rd, Great Smoky Mountains NP, TN/NC

Inspecting road construction and storm damage,Inspecting road construction and storm damage,Glacier National Park, MontanaGlacier National Park, Montana

Guardwall assessment,Guardwall assessment,Glacier National Park, MontanaGlacier National Park, Montana

E X P E R I E N C E Y O U R A M E R I C AE X P E R I E N C E Y O U R A M E R I C A

Denver Service Center / Transportation DivisionDenver Service Center / Transportation Division

National Park ServiceNational Park ServiceU.S. Department of the InteriorU.S. Department of the Interior

Treff AlexanderLandscape Architecttreff_alexander@nps.gov303-969-2172