The Ohio Department of Transportation is using ground-penetrating radar to examine the bridges at the Hilliard-Rome Road exit over Interstate 70.

The Ohio Department of Transportation is using ground-penetrating radar to examine the bridges at the Hilliard-Rome Road exit over Interstate 70.

ODOT representatives say using the technology will save more than $500,000 as they perform repairs on the twin bridges.

ODOT bridge engineers found the northbound Hilliard-Rome Road Bridge was in better shape than anticipated and only needed an overlay, which will cost approximately $300,000.

The southbound structure needed the anticipated deck replacement, an investment of approximately $900,000. The end result is a savings of $600,000.

During ODOT's annual bridge inspection, engineers noticed a difference in the conditions of the twin bridges, even though they were built at the same time. By combining technology with the engineer's experience, ODOT used the ground-penetrating radar to see below the surface of the northbound structure.

ODOT used a specially-designed vehicle to roll over the bridge and capture images that detect corrosion, thickness, weather damage and deterioration. An advantage of using the technology is its minimal impact to the motoring public in terms of lane restrictions during the testing. The testing vehicle collects data as it travels at the same speed as traffic.

The ODOT schedule called for traffic on the northbound bridge to be reduced to one lane on Tuesday, May 26, so crews could prepare to switch traffic when the bridge repairs begin on June 8, weather permitting.

One lane of traffic will be maintained in each direction on the Hilliard-Rome Bridge between Feder and Renner roads. The bridge will not be closed. Work on the bridges is expected to be complete by fall.

Approximately 47,000 vehicles travel the Hilliard-Rome Road/I-70 Interchange every day. ODOT will distributed flyers last week to area businesses so they can inform their customers of the upcoming bridge work.