Cognitive load. A lot of speed limits are dynamic or based on the time of day or dependent on what city you’re in. For example, a nearby street to my house is a

Cognitive load. A lot of speed limits are dynamic or based on the time of day or dependent on what city you’re in. For example, a nearby street to my house is a short 30 zone but the sign isn’t obvious so a lot of people are accidentally going 50.