1) Arrests 2) Checks 3) Cuts back 4) Edges of sidewalks 5) Edges of streets 6) Gutter abutters 7) Gutter adjoiners 8) Hydrant locales 9) Keeps in check 10) Parking meter places 11) Parking meter sites 12) Parking places 13) Pavement edges 14) Places for dogs or cars 15) Places for recycling 16) Places to park 1) Boundaries 2) Holds in 3) Reins 4) Reins in 5) Stems 6) Tames 
They limit the route from the run-off zones or gravel beds.