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Project Ketchum

Project Ketchum

City of Ketchum

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Technical analysis is underway for future transportation enhancements to Main Street.

Main Street Mobility Improvements

The city retained HDR Engineering to complete a technical analysis of future transportation enhancements on Main Street. The project seeks to improve pedestrian facilities and vehicular flow throughout the corridor.

Short-Term Enhancements

Goals:

  • Improve vehicle progression along the corridor
  • Reduce travel times
  • Improve pedestrian space where possible
  • Invest in a roadway configuration that will operate well in future years

Short-term improvements:

  • Removed pedestrian scramble to improve traffic flow
  • Adjusted pedestrian crossing times to better serve pedestrians
  • Worked with ITD to improve signal technology
  • Implemented coordinated signal timing

Long-Term Enhancements

#1 – Current conditions / no change

Microsimulation video of option #1:

#2 – Add left turn lanes at Sun Valley Road

Currently, Main Street consists of 4 travel lanes with no designated turn lanes. This option would add a designated turn lane.

Benefits:

  • Remove split phasing
  • Reduces congestion
  • Serves all traffic
  • Design year traffic sees comparable travel times to today

Drawbacks:

  • Increase in pedestrian crossing distance at Sun Valley Road Intersection
  • Tight turning movements for trucks at Sun Valley Road
  • Removes parking on two blocks

Microsimulation video of adding a left turn lane:

#3 – Lane Reconfiguration

Currently, Main Street consists of 4 travel lanes with no designated turn lanes. This option would have 2 travel lanes with 1 designated turn lane.

Benefits:

  • Remove split phasing
  • Shorter pedestrian crossings
  • Much wider pedestrian and sidewalk areas could be built

Drawbacks:

  • Congestion on Main Street would increase
  • Cannot serve all traffic in the peak period
  • Waiting vehicles could extend 3 blocks or more on Main Street and 2 blocks or more on cross streets

Microsimulation video of 3 lanes:

Community Conversations

Council is exploring options to implement during ITD’s road rebuild in the coming years.

Survey results | 10.18.22
(Draft) Main Street Alternatives Analysis Report | 11.21.23

Upcoming Events

Transportation Projects Update

Related Resources

  • Sun Valley Road 50% Design Set

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PO Box 2315 | 191 5th St. West | Ketchum, ID 83340 | 208.726.3841