Work begins on roundabouts

Construction to improve sight distance, slow traffic

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Construction to improve Lone Tree’s two roundabouts is under way and will continue through mid-July.

The first phase, expected to last about two months, includes reconstruction of the sidewalk ramps and crosswalks, and re-grading the center medians.

Temporary lane reductions and closures are expected in both roundabouts during construction.

“You’ll still be able to get through them, but particularly during the morning and evening rush hours, there may be some back-up,” said John Cotten, Lone Tree’s public works director.

Workers are starting construction on the east roundabout on RidgeGate Parkway near Sky Ridge Medical Center, before moving on to the west roundabout near the Lone Tree Arts Center.

The second phase calls for reducing the height of landscaping in both the roundabout’s center medians to improve sight distance.

The project is in response to drivers’ and pedestrians’ worries about sight distance and drivability of the roundabouts.

In 2012, the City of Lone Tree hired Ourston Roundabout Engineering and Winston Associates landscaping company to study the traffic structures and propose solutions.

Those reports recommended shaving off a portion of the landscaped mounds, and realigning crosswalks and relocating curbs and gutters to naturally slow drivers as they approach the roundabouts.

“Hopefully this will help improve the pedestrian access a little bit,” said Denise Denslow, district manager for the Rampart Range Metro District. “There also will be some slowing of traffic, and as the area continues to be busier, traffic will naturally slow itself.”

Regular commuters are urged to consider alternative routes during the construction, according to the City of Lone Tree.

The roundabouts are part of the RidgeGate development, and RidgeGate’s Rampart Range Metro District will foot the bill for the project. The first phase will cost about $124,000. Bids for the landscaping phase haven’t been awarded, but the cost is estimated at about $74,000.