LEGIBILITY

Good, effective signs are easy to read with simple messages. It may be tempting to include as much information as possible, but good designers know it’s more effective to keep the message very simple. The best way to go about doing this is to prioritize what you need to communicate.

Below shows the distance at which a sign first becomes legible based on how fast a car is moving.

Speed of Traffic Minimum Required Legibility Distance
25 mph 200’
30 mph 240’
35 mph 280’
40 mph 320’
45 mph 360’
50 mph 400’
55 mph 440’