KGUN 9 On Your SideNewsOperation Safe Roads


How to apply to have a speed hump built in your neighborhood

The process of installing speed humps
Neighborhood Speed Humps
Typical Speed Bump vs. Speed Hump
Posted at 10:17 AM, Feb 12, 2019
and last updated 2019-02-15 07:17:06-05

TUCSON — Since we first launched Operation Safe Roads and began asking viewers to share their concerns with us here at KGUN 9, one of the most frequent questions we've received concerns speeding in residential neighborhoods and how to go about having speed bumps, speed tables, or speed humps installed.

The most recent request came from a viewer who lives near the intersection of Roger and Mountain, an area where people say drivers will ignore the 25 mile-per-hour speed limit. This situation has led several people in the neighborhood to want speed humps put in place so that people slow down.

Typical Speed Bump vs. Speed Hump
Typical Speed Hump

The purpose of a speed hump is to reduce the speed of vehicles on residential streets where speeding is occurring. They are not designed to change the volume of traffic on residential streets, and do not significantly reduce cutthrough traffic. However, recent speed hump studies have shown a 40-60% reduction in vehicles exceeding the speed limit, according to the City of Tucson.

Neighborhood Speed Humps

What Is the Difference Between a Speed Hump, a Speed Table, and a Speed Bump?

  • Speed humps are nationally accepted, and are used on residential streets. A speed hump is 12’ wide and 3” to 3 1/2” high.
  • Speed tables are nationally accepted, and are used on secondary emergency streets when the Fire Department has determined that speed humps are not appropriate. A speed table is 22’ wide and 3” to 3 1/2” high.
  • Speed bumps are prohibited on local streets, and are used exclusively in shopping centers, apartment complexes, and other private properties. A speed bump is 2’ to 3’ wide and 4” to 6” high.
Typical Speed Bump vs. Speed Hump
Typical Speed Hump

According to the Tucson Department of Transportation, neighborhoods looking to install speed humps need to fill out a speed hump request form. Once the form has been submitted a "petition form and highlighted neighborhood map" will be sent to you. The petition must be filled out accurately by your neighborhood representative and will require 60% approval signatures from neighbors on abutting streets. Once this step is achieved the petition can be returned to TDOT and, if approved a study will be performed, payment will be arranged, and once payment is confirmed a date for construction will be established.

The management program says the cost for a speed hump is set at $500 and you will have to pay for it yourself.

Disadvantages to Installing Speed Humps:

  • Emergency response vehicles may be delayed between 2 to 10 seconds per speed hump.
  • Noise levels may increase when vehicles drive over the speed hump.
  • The motorist may tend to drive closer to the curb to have only one side of the car go over the speed hump.
Neighborhood Speed Humps

For those interested in going through this process, it's important to remember that submitting a petition does not guarantee the plan will be approved and installed. There are several factors, including existing speed humps and potential flooding issues that can cause a request to be denied.

More information is available on the TDOT website in the section dedicated to outlining these processes.

Operation Safe Roads
KGUN 9 is committed to making our roads a safer place to travel on foot, on bikes, and in our vehicles. We welcome your input. Send your issues and concerns about the safety of our roadways to or call 520-290-7690.