Frequently Asked Questions – FAQ

What is the speed limit on my street?

The City of Columbia code of ordinances set the speed limits for streets in ordinance number 14- 223. If your street is not specifically called out in this document, assuming it’s a residential street the speed limit is 25 mph.

Can we simply reduce the speed limit to slow speeding traffic?

No. The City of Columbia has set the posted speed limit with good reasons in mind including, road characteristics, traffic mix, collision history, and road function.

Why can’t stop signs be installed?

Stop signs are considered traffic control devices and not traffic calming measures. They are intended to control the flow of traffic at an intersection and assign right-of-way. Traffic noise and speeds may increase with the introduction of a stop sign. Standard engineering thresholds are applied to determine if a stop sign is “warranted.” Unwarranted stop signs are more likely to be ignored by motorists and have been found to lead to increased collisions.

Are traffic circles and roundabouts the same thing?

No. Roundabouts are large islands often used instead of a traffic signal at an intersection of larger (non-residential) roadways. Roundabouts require entering traffic to yield to traffic already in the circle. Roundabouts use splitter islands to channel entry to the roundabout. Traffic circles are not the same device–a small raised island located in the center of an intersection. These are often used in residential areas and prevent drivers from speeding through the intersection by impeding the straight-through movement.

Where can I get more information?

Please refer to the Neighborhood Traffic Management Program handbook and Traffic Calming Guide for more detailed answers to these and other questions. If you still have questions, contact Public Works.

Public Works
(573) 874-2489

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