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  • Neighborhood Traffic Management Program

    traffic circle

    The Neighborhood Traffic Management Program (NTMP) improves traffic safety in neighborhoods by reducing speeding vehicles and reducing cut-through traffic. Residents may partner with Pima County to modify neighborhood streets with traffic calming techniques such as speed humps and traffic circles.


    To request an information packet please email or call (520) 724-6410.

    To participate in this program, a neighborhood must:

    • Be located in an unincorporated area of Pima County
    • Have paved roads maintained by Pima County
    • Have a posted speed limit of 25 mph
    • Be classified as a local road (Federal Functional Classification) 

    Basic Program Procedures

    1. Constituent contact PCDOT.  Neighborhood representative will contact PCDOT in order to convey neighborhood traffic concerns. This may occur through a phone call (520-724-6410), by PCDOT website www.pima.gov/transportation, or by reporting a concern on www.pima.gov/SeeClickFix.

    2. Application Petition

    3. Data Collection

    4. Traffic Management Plan Development

    5. Approval Petition

    6. Construction

    Please download and review the Neighborhood Traffic Management Program packet for further details. 

    Traffic Calming Techniques

    Speed Hump

    speed bump

    Traffic Island 

    traffic island




    Q: Does our neighborhood qualify?

    A: For neighborhood streets to be part of the NTMP the must meet the following requirements:

    • Within unincorporated Pima County

    • 25 mph posted speed limit

    • Local (Federal Functional Classification)

    • Residential

    • Paved

    Q: What is the affected area?

    A: The TIBA is the area that will be directly affected by the installation of the traffic calming devices.  For the NTMP, this includes the street(s) that have speeding or cut-through traffic problems. It also includes any streets whose residents must use the street with proposed traffic calming devices to enter or exit the neighborhood. This includes cul-de-sacs and dead-end streets connecting to the street.

    Q: How much effort will be required by the neighborhood?

    A:  Residents will need a point of contact or a neighborhood advisory committee to communicate with PCDOT staff, distribute and sign the application and approval petitions, select the traffic management plan, and raise funds to pay for the selected traffic calming devices. 

    Q: What is the difference between a speed bump and a speed hump?


    Speed Bump: Parabolic vertical traffic calming devices intended to slow vehicular speeds to approximately 5 mph. They range in height from 4-6 inches, are 2-3 feet in length, and widths depend on road width. These are used in shopping centers, apartment complexes, and private driveways.

    Speed Hump: Parabolic vertical traffic calming devices intended to slow speeds to 15-20 mph. They range in height from 3-4 inches, are 12-14 feet in length, and widths depend on road width.  These are generally used on low speed, residential roads. 

    Speed Table: Vertical traffic calming devices like speed humps, but flat-topped, intended to slow speeds to 25-45 mph. They range in height from 3-3.5 inches, are 22 feet in length, and widths depend on road width. These are often installed when posted speed limits are higher and speed humps are not appropriate. 

    **PCDOT only allows speed humps through the NTMP at this time.**

    Q: Are speed humps our only alternative?

    A:  Currently, PCDOT allows the use of speed humps and traffic circles as traffic calming devices. 

    The neighborhood’s concerns and input will be incorporated into the final plan that is developed.

    However, PCDOT will only allow devices that are not a threat to the traveling public. PCDOT will not jeopardize the safety of the motoring public at any time.

    Q: Can our neighborhood get just one speed hump?

    A: No, speed humps only work if they are in series. Speed humps placed properly ensure consistent speeds through an area. A single speed hump only ensures a low speed in the immediate vicinity of the speed hump.

    Q: Is our whole neighborhood required to have traffic calming devices?

    A:  For many neighborhoods, traffic calming devices on one street are adequate. Although there is no requirement, it could be advantageous to have devices on any street(s) experiencing high vehicular speeds and large amounts of cut-through traffic.

    Q: Who decides in my neighborhood if we should have traffic calming devices?

    A: The decision to participate in the NTMP and accept the recommended plan is made by the residents. Any proposals developed by PCDOT and agreed upon by the neighborhood representative(s) must be supported by 60 percent of the residents in the TIBA.

    Q: How much will traffic calming devices cost?

    A:  A speed hump costs between $1,500 and $3,500 to construct. A traffic circle normally costs between $4,000 and $7,000 to construct. These costs vary by contractor and width of road.

    Q: How long is the process?

    A: The length of time depends on the commitment of the neighborhood, and the extent of the NTMP plan supported by the residents. Some projects have been completed in as little as six months, while others have taken several years. In most neighborhoods, the process has taken approximately 9 months.

    Q: Will emergency vehicles be slowed by a speed hump?

    A: Yes, all vehicles traveling through the neighborhood will have their speeds reduced. Based on studies by fire departments, each speed hump reduces the response time of an emergency vehicle by approximately four seconds.

    Q: Can the neighborhood get an all-way stop at some intersections?

    A: The Manual on Uniform Traffic Control Devices specifically states that STOP signs shall not be used to control speed. An all-way stop control must be warranted by federal guidelines. PCDOT does not install stop signs to slow traffic or to discourage cut-through traffic. Studies have shown that motorists tend to increase their speeds on segments between stop signs.

    Q: If PCDOT is repaving our road, can we have speed humps added to the work? 

    A:  No, unfortunately, the Pavement Preservation Program and the NTMP are separate programs and may not be combined. Pavement Preservation packages do not include installing traffic calming measures unless they already exist. The contractor will reinstall any devices that were temporarily removed for paving operations but may not alter the design of the traffic calming measures.

    Q: What is the general order of events in the NTMP?

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    Kathryn Skinner, P.E.

    201 N. Stone Ave., 4th Fl.
    Tucson, AZ 85701

    Phone: (520) 724-6410
    Fax: (520) 724-6439

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