Route HH Interchange Improvements along Route HH in Platte County

Details

This project will include many interchange and safety improvements. Some of these improvements include: 

• A roundabout at the intersection of the I-29 SB exit ramp and Vine Street.
• Deceleration lane added to the I-29 SB/NB exit ramps
• I-29 NB exit ramp widening for a right turn lane at the terminus of the ramp with Route HH.
• Turning radius improvements at WB Route HH to the I-29 NB entrance ramp.
• Full depth shoulder replacement on the I-29 NB entrance ramp
• Slide repair on the south side of Route HH, just east of NB ramps
• Guardrail replacement on the SB/NB I-29 exit ramps
• Drainage improvements include replacement of a pipe between Old US-71 and the I-29 SB lanes.
• Repair to a sinkhole in the median of I-29.

Traffic Impacts

• The I-29 SB exit ramp and Vine Street intersection will be closed for the construction of the roundabout. Traffic will utilize the two other interchanges nearby as a detour:
  • I-29 and Route 273
  • I-29 and Route 92
• The I-29 NB exit ramp will close for construction of the new deceleration lane. This will be completed in a different phase of the roundabout construction due to the need for using the NB ramps during the detour.
• Other work will require the need for lane/shoulder closures with temporary periodic closures using a detour similar to the one for the roundabout construction.
• The slide repair work may require narrowing of Route HH with some lane closures of WB Route HH and utilizing a flagger setup.