The Interstate 40/U.S. Highway 93 interchange project in Kingman, Arizona, is 70 percent complete, with key elements of the $106.5 million project set to get underway soon. A major component of the yearslong project connecting the highways is a flyover ramp at Clack Canyon Road that will allow southbound traffic on U.S. 93 to connect to eastbound I-40 without having to exit on Beale Street. Work on that bridge structure is imminent, according to the Arizona Department of Transportation. “The ramp doesn’t cross over I-40 yet, but it’s clear where the new connection will tie into the highway,” said ADOT spokesman Garin Groff. “We are now making preparations to place bridge girders over I-40.” Other work underway includes blasting and creating 1 mile of new ramps between I-40 and U.S. 93. Along that route, two tunnels have been completed. One, which will allow traffic to move from downtown Kingman near Beale Street to connect to U.S. 93 northbound, has yet to open to motorists.…