PennDot is warning motorists of single lane restrictions planned on Interstate 79 for patching and crack sealing work. The restrictions will occur in the southbound lanes between Exit 45 (Canonsburg) and Exit 43 (Houston/Eighty Four). Restrictions took place on Monday, November 24th and will wrap up on Tuesday, November 25th. Start time is 8:00 a.m. and the work will wrap-up at at 1:30 p.m. Back-ups of at least twenty miles were reported on Monday due to the work. Motorists are asked to use caution, remain alert, avoid distractions and practice patience while traveling through the work zone.