. Potential effects of highway mortality and habitat fragmentation on a population of painted turtles in Montana . Wildlife crossings; Roads; Turtles; Traffic safety and wildlife. Figure A-8. Paynes Prairie Ecopassage - Artist rendition. Concrete wall with lip. (Florida). Photo: D. Forsyth. The height of the lipped wall was determined by herpetologists based on the characteristics of several species known to be in the area (alligators were a primary concern). That height was 1 m, but an extra m was added to ensure containment of the majority of potential species (P. Southall, Florida Depa
. Potential effects of highway mortality and habitat fragmentation on a population of painted turtles in Montana . Wildlife crossings; Roads; Turtles; Traffic safety and wildlife. Figure A-8. Paynes Prairie Ecopassage - Artist rendition. Concrete wall with lip. (Florida). Photo: D. Forsyth. The height of the lipped wall was determined by herpetologists based on the characteristics of several species known to be in the area (alligators were a primary concern). That height was 1 m, but an extra m was added to ensure containment of the majority of potential species (P. Southall, Florida Department of Transportation, Pers. Comm.). The m lipped extension at the top of the wall was designed to stop an animal before it scaled the top of the wall. Motorist safety was a big consideration in the design. The lipped wall was placed at the edge of an 11 m clear zone, from which all palm trees had been removed. Stormwater is removed through median and clear zone drains, which also allows light to enter the culverts (Figure A-9). Concrete was selected because of reduced maintenance costs, long-life span, and the potential effectiveness as a barrier. Other materials for the barrier were considered, including hardware cloth and wire (expensive, short life span, the surface allows some species to climb over), and plastic (short life span). The concrete wall was also simple to construct because it was precast; the km of road (therefore, km of lipped wall) took about 210 days to construct. Precast structures (wall segments and culverts) saved installation time, and therefore cost. The 'flowable fill' over the culverts allows for the maximum size opening in the road because it is part of the roadway rather than requiring additional fill over it (USDA Forest Service website ). The cost was listed at greater than $200,000 but there is no indication of what this value includes. The total project cost was listed as $ million. This cost included
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Keywords: ., bo, bookcollectionamericana, booksubjectroads, booksubjectturtles
