Southbound 163 at Clairemont Mesa Boulevard will be reduced to two lanes in the evening over the next three weeks for construction, Caltrans said.
The lane reductions run from Friday at 9 p.m. to Saturday, July 16.
Caltrans construction crews will also close all southbound lanes of SR-163 between State Route 52 and Clairemont Mesa Boulevard for three nights in June.
The closure includes the connector ramp from eastbound SR-52 to southbound SR-163 as well as the westbound lanes of Clairemont Mesa Boulevard over SR-163.
That closure will take place on the following nights:
• Saturday, June 25 at 9 p.m. to Sunday, June 26 at 9 a.m.
• Sunday, June 26 at 9 p.m. to Monday, June 27 at 4:30 a.m.
Local
• Monday, June 27 at 9 p.m. to Tuesday, June 28 at 4 a.m.
Drivers on southbound 163 will be detoured to westbound SR-52 to southbound 805 then to the I-805/SR-163 Interchange.
Eastbound SR-52 motorists will be detoured to southbound Interstate 15, then to the I-15/Interstate 8 Interchange.
Westbound Clairemont Mesa Boulevard drivers will be detoured to southbound Kearny Villa Road.
Signs have been placed to alert motorists about the upcoming closures.
