Highway 29, in both directions. Geotechnical investigation between Halfway River Bridge and Upper Cache Rd for 4.1 km (4 km north of Halfway Rest Area to Halfway Rest Area). Until Fri Sep 15 at 7:00 PM MST. Single lane alternating traffic and single lane closures may be needed for some locations and for shoulder barrier removal or replacement and equipment moves. Last updated Mon Aug 14 at 12:34 PM MST. (DBC-55327)