W. Glenwood exit needs an upgrade
Question: Why did we need ramp improvements and roundabout enhancements at Interstate 70 Exit 114?
Three main reasons explain why Exit 114 is getting a facelift: capacity issues, safety and functionality.
During the Grand Avenue bridge detour in fall 2017, Exit 114 will be the primary entrance and exit for commuters and visitors. This required that CDOT evaluate the interchange in terms of vehicular capacity, safety and basic functionality.
During the planning, it became apparent that the closure of the bridge would have negative effects at Exit 114 as we divert commuters and crosstown traffic to the interchange.
Capacity issues: The current design of the roundabouts at Exit 114 does not easily absorb peak traffic during the morning commute and afternoon. The improvements will allow traffic flow to be maintained through the roundabouts. This will mitigate increased traffic by providing extra lanes for the primary movement of traffic in the morning and afternoon peaks.
Safety: Safety is a concern during the morning commute. If CDOT left the ramp in its existing alignment, the increase in traffic volume would result in vehicles backing up onto the interstate itself. By lengthening and widening the ramps, CDOT will add deceleration length to ensure that greater amounts of traffic can get off the highway in a manner that reduces the likelihood of stopped vehicles on the interstate.
Functionality: The current roundabout design makes navigating difficult for both large trucks and passenger vehicles. Traffic designers have learned a lot about the functionality of roundabouts, as they have become more mainstream in road design. Given the expected increases in traffic and lessons learned of the past, CDOT’s improvements will attempt to make the roundabout more navigable than it is now.
These improvements are permanent and are designed to meet the future traffic needs of the west Glenwood Exit 114. Roadwork will continue throughout the summer.
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