Current Projects

Below is a list of current traffic calming projects happening in Iowa City. 

Four to Three Lane Conversations 

The ultimate goal or four to three lane conversations is safety: reducing vehicle collisions and traffic speeds. These are being implemented in 2018 on a number of Iowa City streets, including portions of Clinton Street, Madison Street, and Mormon Trek Boulevard. Portions of Gilbert Street are also being reviewed for this treatment. A conversion was completed on First Avenue between Bradford Street and Lower Muscatine Road in 2017.

This video provides a helpful explanation of how road diets work and the benefits measured by the DOT on roads throughout Iowa.

Neighborhood Traffic Calming Projects

The goal of Iowa City’s Neighborhood Traffic Calming Program is to reduce excessive speeding and/or traffic volumes on streets. Participation in the program is neighborhood-initiated and is not imposed by the City. To find out more about the traffic calming program, view the traffic calming brochure.

Highland Avenue 

Current Phase: City Council to consider on Oct. 2, 2018

At the request of residents of Highland Avenue, City staff have been working to address concerns about traffic speeds along the corridor.

On July 31, a survey letter was mailed to residents of Highland Avenue, between Keokuk and Boyrum Streets. Each letter included a stamped postcard to provide responses, which were due by August 31. The City’s Traffic Calming Program requires at least 50% of those addresses surveyed to return their survey postcard and, of those households that respond, 60% must indicate support for the proposed traffic calming project. 

MPOJC staff mailed surveys to 20 addresses located directly adjacent to the affected portion of Highland Avenue and received responses from 11 households: a 55% response rate. Of those responding, 9 households checked “yes” and 2 households checked “no” with regard to the proposed installation of speed humps: that is 81% of respondents in support of speed humps. Based on this response, a proposal to install speed humps will be forwarded to the City Council for consideration on October 2.

If approved by City Council, speed humps will be installed in Spring 2019.

7th Avenue 

Current phase: pilot program to be installed August 2018

The City will install two radar feedback signs along 7th Avenue between Glendale Road and Court Street, one for northbound traffic and one for southbound traffic.

The signs display the driver's speed and caution them to slow if they are speeding. Research indicates that feedback signs may be effective at lowering speeds, especially among drivers exceeding the speed limit by 10 MPH or more.

Staff will re-evaluate speeds 6 and 12 months after installation to measure their effect on speeds. Staff recommend that signs be removed if they do not produce a substantial sustained reduction in speeds or if maintenance and reliability becomes an issue.

No additional installations of radar feedback signs will be considered elsewhere until after the end of the 12-month study period is complete.

Related Documents: 

Friendship Street 

Current phase: construction Spring 2018

Speed humps were installed at four locations along Friendship Street, between Court Street and Brookside Drive, and allow drivers to travel at a consistent speed of 20-25 MPH.

Contact Information 

For questions about Iowa City’s Neighborhood Traffic Calming Program, contact Assistant Transportation Planner Sarah Walz at 319- 356-5239 or