Bollard Placement Simulator

Drag the slider to move bollards closer or further from the intersection and see how the turning arc and speed change.

Case 1: WestBound → SouthBound (left turn)
-
km/h forced
turn speed
-
metre turn
radius
-
speed
reduction
Bollard distance from intersection5 m
0 m (at edge)10 m
Case 2: EastBound → SouthBound (right turn)
-
km/h forced
turn speed
-
metre turn
radius
-
speed
reduction
Red dashed: current corner-cutting path (~45 km/h). Green arc: forced proper turning path when bollards keep cars in their lane. Closer bollards = tighter turn = slower speed.
Speed model: V ≈ 11.2√R (AASHTO Green Book low-speed urban) · FHWA ePrimer Ch 6 · TRL Report 313