If you are wondering what's going on on Ynez Road, here's the info i got from the City of Temecula:
Ynez Road between Rancho Vista Road and Tierra Vista will be widened to two lanes in each direction, with construction of a new sidewalk along the east side. This project is currently in the design phase, and is anticipated to be completed in 2024.
So try to be patient with the upcoming construction- it will be a HUGE improvement when it is completed.