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Isanti reviews roundabout redesign after new truck counts; staff recommends slightly larger center and added turn lanes
Summary
City staff presented geometric changes to a proposed roundabout after updated traffic counts showed higher heavy-vehicle use. The plan shifts from a ‘mini’ to a small standard roundabout, adds a westbound left at Credit Union Drive and a turn lane into Kwik Trip; staff will advance to 3‑D design and begin land-easement work.
City staff presented a design-phase update to the proposed roundabout on Heritage Drive, saying new traffic counts and heavy-vehicle analysis prompted changes to the intersection geometry designed to reduce congestion and avoid semis blocking the intersection.
“So now that we, have been able to move into design phase of this project, we went and collected new traffic counts, kept track of the heavy heavy vehicle, the big truck counts ... and kinda came up with some tweaks to that original concept,” the presenter said, describing a shift from a mini roundabout with a fully concrete center to a slightly larger small standard roundabout with a planted center and surmountable curbs for truck tracking.
The principal modifications staff described are: increasing the roundabout diameter (moving away from the 75‑foot mini…
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