Write-up

Tredway Riverfront Trail
Line Name   surface  routes  total miles  gap  off_road  on_road  closed  unknown  other   
map Ramp across NS Tracks  Trail route determined not built  tredway,e2p, ,epta-ken, see Setter,epta-free  0.3946  0.3946              
map Kiski to Freeport Bridge  trail Open Limestone  tredway,e2p, ,epta-ken, see Setter,epta-free  1.5124    1.5124            
map Under Freeport Bridge to Yacht Club  trail Open Limestone  tredway,e2p, ,epta-ken, see Setter  1.5963    1.5963            
map Yacht Club towards Braeburn  trail Open Limestone  tredway,e2p, ,epta-ken, see Setter  1.0147    1.0147            
map milepost zero to milepost 1  trail Open Limestone  tredway,e2p, ,epta-ken, see Setter  0.9998    0.9998            
           
Tredway Riverfront Trail  total for Trail    5.5178  0.3946  5.1232            
           

Trail Lines are typically entered by tracing satellite imagery to extract latitude/longitude coordinates. The accuracy of these coordinates changes depending on the source of the photo and the precision of placement. I have seem satellite edges mismatched on the order 55 feet. Line work is sometimes extracted from the Open Street Map Project and from Strava heat maps.
>Milepost Known milepost (are placed on the map when they are visible in the satellite image or can be located via to visible features in the image. Other miles posts are extrapolated using calculations along the rail line. Note Railroads have also been known to realign trackage and not move existing mileage markers, only making an annotation on their paper maps.
Distances Above are based on the google map distance between two points along the line work.