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Thank you for your interest in the 13th Street Traffic Calming Project (Phase 1) – your input is important!

How to navigate these slides:

  • Click on the arrows at the bottom of your screen.
  • Use the navigation menu at the left of the screen to revisit any part of the meeting.

How to participate

  • Click through the slides to learn more about the project and give your feedback.
  • Provide a comment at any time by clicking the “Comment” button at the top of the screen. You can close the form to continue through the slides. Please make sure to hit the “Submit” button to confirm that your comment is sent to the project team.
  • The entire session should take less than 20 minutes to complete.
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Project Background

The Ada County Highway District (ACHD) conducted a traffic calming concept study for 13th Street from Fort Street to Hill Road in 2018.

  • The ACHD Commission adopted the 13th Street Traffic Calming Concept Study: Fort Street to Hill Road in July 2018, which includes:
    • Permanent radar speed limit signs
    • Bulb outs at several intersections along 13th Street
    • A rectangular, rapid flashing beacon (RRFB) near North Junior High
    • extending the sidewalk, curb, and gutter along the north side of 13th Street/Hill Road from Camel’s Back Park to 15th Street.
  • Before adoption, ACHD held neighborhood outreach meetings on March 8, 2018, and May 22, 2018, to collect public feedback about various traffic calming options along 13th Street.

Traffic Investigation Results

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Investigation showed peak hour (5-6 p.m.) volumes measured on 13th St. at several locations that met the threshold for traffic calming.

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Average speeds of vehicles recorded ranged from 21-29 mph. Some outliers exist where vehicles traveled at higher speeds. Posted speed limit is 20 mph.

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The number of cars using 13th St. has remained relatively unchanged over the past 10 years.

Hover over the years below to learn more

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Project Map

Project Phases

The project will be constructed in phases. The Phase 1 improvements are currently funded and will be designed and constructed in the next year. Phase 2 improvements will be funded, designed, and constructed in the future.

Phase 1 Improvements

Install radar speed limit signs.

Install bulb outs and pedestrian ramp upgrades at five intersections along 13th Street.

Install a Rectangular Rapid Flashing Beacon (RRFB) at the Resseguie Street and 13th Street bulb out crossing.

Replace the existing flume lid sidewalk along Camel’s Back Park with new sidewalk.

Phase 1 - Project Details

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The speed limit on 13th Street is posted at 20 MPH. Bicycles share the entire roadway lane with motor vehicles.

To make drivers more aware of their speed, ACHD will place permanent radar speed limit signs on the north and south ends of 13th Street.

Benefits of Bulb-outs

  • Slow and calm traffic
  • Provide space to install ADA compliant pedestrian ramps on existing sidewalks where they are otherwise too narrow
  • Provide additional visibility and protection for pedestrians when crossing the street
  • Reduce the exposure of pedestrians to vehicular traffic

Challenges with Bulb-outs

  • Will require removal of one on-street parking spot on each side of 13th Street in the vicinity of the intersection.
  • May be difficult for large delivery trucks to navigate.

What is a bulb out?

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Bulb-outs are an extension of the curb or the sidewalk into the street, usually at an intersection, that narrows the road, inhibits fast turns, and shortens the crossing distance for pedestrians.

6 bulb out images

Schedule/What’s Next?

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Design complete in
winter 2021

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Construction begins
summer 2021

Thank You

Thank you for participating! Please visit ACHD’s 13th Street Traffic Calming Project homepage.