On what type of roadways are bicycles prohibited?

The prohibition of bicycles on certain types of roadways is primarily focused on safety and the nature of traffic flow. Bicycles are often restricted from roadways with higher speed limits, such as those with posted limits of 50 miles per hour or higher, because the speed differential between vehicles and bicycles can create dangerous situations. When motor vehicles travel at high speeds, the risk of collision is significantly increased, and cyclists may not be able to react adequately to fast-moving traffic.

Highways, in particular, are designed for faster, motorized vehicles with limited access points and no cross traffic, making them unsafe for bicycle riders. While lower speed limit roadways might allow for bicycles, with more controlled environments and potentially lower volumes of traffic, the higher-speed roads demand stricter regulations to ensure the safety of all road users.

So, in the context of this question, understanding that bicycles are typically banned from roadways with high speed limits reinforces the necessity for cyclist safety in traffic situations where their vulnerability is significantly amplified.