SH-20 will be closed between SH-18 in Ralston and SH-99 in Hominy in Osage County from 10 a.m. Friday through Tuesday as part of an ongoing bridge rehabilitation project at Bug Creek. Motorists can detour using SH-18, US-60 and SH-99. Local traffic will still be allowed access to SH-20. Truck traffic will be restricted to 10 tons through Dec. 27 once SH-20 reopens Tuesday.