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Examples from New Jersey: the River Road turtle tunnels, Assunpink Wildlife Management Area passages, and Waterloo Road amphibian-crossing design. Explore the official plans, maps, and monitoring approach.
New Jersey has built and planned wildlife crossings that can be studied directly. At River Road in Bedminster, a New Jersey Fish and Wildlife poster documents a turtle-crossing project with five tunnels and guiding fence. At Assunpink Wildlife Management Area, two under-road passages and guide fencing reconnect wetland habitat, with monitoring used to learn how animals use the system. The Waterloo Road project page describes four proposed amphibian tunnels along roughly 1,200 feet of road and guide fencing; consult the official page for current status rather than assuming construction is complete.
A useful design starts with mapped habitat and observed movement, not a generic bridge. New Jersey’s Connecting Habitats Across New Jersey (CHANJ) tools identify landscape connections and help agencies, landowners, and municipalities ask where barriers matter. Field observations, roadkill records, wetland and stream maps, species needs, drainage, road geometry, and nearby development should shape site selection.
A crossing is a system: the structure, approach habitat, guide fencing, drainage, maintenance, and monitoring all matter. Cameras, track pads, seasonal surveys, and safe roadkill observations can help answer whether the route is being used and whether conflict changes nearby. Follow the official monitoring and maintenance information for each project; do not infer project outcomes from a design image alone.
Residents can contribute by recording wildlife observations through NJ Fish and Wildlife’s current reporting tools, sharing exact locations safely, and raising corridor questions during municipal transportation and land-use reviews. Never stop in a travel lane to photograph wildlife. Ask public agencies for the plan sheet, target species, construction status, maintenance owner, monitoring method, and accessible human travel routes alongside the crossing design.
The linked River Road poster is a project-level layout example showing the tunnel locations and guiding fence; use it to understand how a plan can communicate a system, not as a build-ready specification. The Assunpink page describes two installed passages and fencing and explains the monitoring context. The Waterloo page describes a four-tunnel amphibian crossing design; its project status must be checked with NJDEP before describing construction as complete.
Ask the responsible agency to show the mapped movement corridor, field observations, target species, alternatives considered, plan sheet, drainage and fencing details, accessibility and traffic-safety measures, maintenance owner, construction status, and monitoring results. Use CHANJ as a starting map, then ground-truth it with local ecological knowledge and safe field observations.
Short evidence blocks and visual explainers are included with the guide so you can check an idea, follow a source, or take it into a classroom or meeting.
These official pages provide real project references. Check with NJDEP for current project status before relying on dates or construction claims.
NJDEP project poster with five turtle tunnels and the guiding-fence layout. A useful blueprint-style project drawing, not a construction specification for other roads.
Open the official pageNJDEP describes two under-road passages, guide fencing, wetland reconnection, and monitoring of wildlife use.
Open the official pageNJDEP’s plan page describes four proposed tunnels beneath about 1,200 feet of road with guide fencing. Check NJDEP for current status; this guide does not claim completion.
Open the official pageStart with New Jersey’s habitat-connectivity mapping and planning resources, then validate mapped routes with safe field observations and local expertise.
Open the official pageThe NJDEP River Road Turtle Tunnel poster shows the Bedminster project, including the tunnel and guiding-fence layout. It is a project poster and plan example, not a construction specification for another site.
The NJDEP River Road Turtle Tunnel poster documents five turtle tunnels with guiding fence in Bedminster, Somerset County.
NJDEP describes two under-road wildlife passages and guide fencing at Assunpink Wildlife Management Area, designed to reconnect wetland habitat and monitored for wildlife use.
NJDEP’s Waterloo Road page describes four tunnels beneath about 1,200 feet of road with guide fencing. The page should be checked for current status; this guide does not claim construction is complete.
New Jersey’s Connecting Habitats Across New Jersey (CHANJ) program provides habitat-connectivity maps and planning tools to help identify landscape connections and barriers.
No. NJDEP’s crossing examples combine a structure with approaches or guide fencing, and project monitoring and maintenance are also important.
Use CHANJ mapping, safe field observations, roadkill information, habitat data, and local knowledge together; one observation or map layer alone is not a complete site assessment.
Use NJ Fish and Wildlife’s current wildlife reporting guidance or NJ Wildlife Tracker when appropriate, and never enter a roadway or stop in a travel lane to document an animal.
They are examples, not ready-made specifications. A qualified project team must adapt the design to local species, movement routes, road conditions, drainage, utilities, safety, and maintenance.
Start with NJDEP’s CHANJ tools and project pages, then review the River Road, Assunpink, and Waterloo references linked on this page.