Projects Transportation

I-275 Pavement Rehabilitation

Boone County, Kentucky

This project included the rehabilitation of 2.85 miles of rural interstate four-lane PCC pavement on I-275 from the Ohio River Bridge to just east of the KY 8 interchange. The pavement rehabilitation utilized an 11” JPC overlay on a 1” asphalt bond breaker course (open graded drainage course) to minimize reflective cracking. However, to remedy a settlement problem at the west end of the approach to the Ohio River Bridge, approximately 1700’ of the existing PCC pavement was removed and replaced full depth with 18-¼” asphalt pavement on 6” DGA on 12” No. 2 crushed stone with perforated pipe underdrains. This route carries a heavy volume of traffic (2006 ADT of 29,271 projected to be 79,757 by 2026 with 20% trucks).

DLZ studied two separate pavement repair alternates utilizing three different Maintenance of Traffic Schemes (MOTs). The MOT strategy selected shifted all traffic to one roadway using a reversible lane with a moveable concrete barrier wall, a first for Kentucky. Traffic flow on this I-275 section was heavily directional during AM and PM, making this particular MOT strategy successful and providing a $2,000,000 savings over a conventional method by providing two lanes in the peak direction of travel at the appropriate times. This MOT plan included five construction phases and the use of four median crossovers and eight slips ramps. The MOT plan also accommodated the full depth replacement on the Ohio River approach in 16 calendar days.

The twin I-275 bridges over KY 8 were jacked/raised in elevation to meet new JPC Overlay to avoid digouts at their approaches. Other items of work included the installation of pavement edge drains, replacement of all guardrail, installation of flexible delineators and raised pavement markers, adjustment of several median box inlets, and rehab all ramps on KY 8 interchange.