How Intersection Design Reduces Conflict Points

A conflict point is a place where two road users' paths can cross, merge, or diverge. Intersection design can improve safety by reducing the number of those conflicts, lowering the speed at which they occur, or separating them in time.

Why are intersections complex?

They concentrate through traffic, turning vehicles, pedestrians, bicycles, and sometimes multiple lanes into one location. Severe crashes are especially associated with high-speed crossing conflicts such as right-angle movements.

How can design reduce conflicts?

Roundabouts change crossing conflicts into lower-speed merging and diverging movements. Refuge islands let pedestrians negotiate one direction of traffic at a time. Raised intersections reduce speed. Signal timing can separate pedestrian and turning movements so they do not occur simultaneously.

Does fewer conflict points always mean a better design?

It is an important safety factor, but not the only one. Traffic volume, pedestrian demand, accessibility, road function, available space, cost, and driver understanding all have to be considered together.

Connection to Sam's policy

Sam supports improved intersections and a safety focus on high-crash corridors. Conflict-point analysis is one of the engineering concepts that can help determine why an intersection is unsafe and which treatment best addresses the problem.

Research basis: Zegeer et al. (2005); Ewing & Dumbaugh (2009); Huang & Cynecki (2000).

Roundabouts → · Pedestrian signals →