Speed Humps

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illustration of speed bump 18x3.5 inches and speed hump 1 foot by 3.5 inches highWhat Is a Speed Hump?

The difference between a speed bump and a speed hump, showing the standard City of Tucson hump dimensions. The city does not allow speed bumps.

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.

Speed hump in street and house with neighbor walking down sidewalkWhat Is the Purpose of a 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.

How Effective Are Speed Humps?

In The City of Tucson, speed humps have been shown to be very effective in reducing the speed of vehicles traveling on residential streets. Recent speed hump studies have shown a 40-60% reduction in vehicles exceeding the speed limit.

How Does a Citizen Have Speed Humps Installed In Their Neighborhood?

  1. A neighborhood or an association representative fills out the Speed Hump Request Form
     
  2. A petition form and highlighted neighborhood map will be sent to the mailing address provided.
     
  3. Petitions are filled out and require 60% approval signatures from neighbors on abutting streets.
     
  4. The petition is then be scanned and emailed to, neighborhoodtraffic@tucsonaz.gov or taken to, ATTN: NTMP 201 N Stone Avenue – 5th Floor.
     
  5. TDOT will conduct a study on approved applicants.
     
  6. If the street is approved for construction the contact/liaison will be notified. (If your street is denied an explanatory email will be sent.)
     
  7. Approved applicants will receive an email with a payment link. Speed humps are installed at a total cost of $500.00 per speed hump to the neighborhood.
     
  8. Once payment has been received a date for construction will be established and relayed to applicants.

Please Note:

  • This program allows 5 speed humps/tables per ward on a first come first serve basis at a reduced price of $500 each. Additional speed humps/tables can be added in any Ward at the non-discounted price of $4,500 at any time
     
  • Some speed humps may not be approved due to potential flooding issues or other circumstances.

 

How Many Speed Humps Do You Install on a Street?

The number of speed humps installed on a street depends on the length of the street. For speed humps to be effective, they must be installed in a series, approximately 400’ to 600’ apart. One speed hump alone is not advised–they are used as a system.

Disadvantages:

  • Emergency response vehicles may be delayed between 2 to 10 seconds per speed hump.
  • 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.

Who Pays For Speed Humps?

The installation of speed humps is paid for by the residents themselves. The residents can pay for the speed humps through contributions. 

Back to Neighborhood Traffic Management Program Speed Hump Request Form