Lane closure, 10 Freeway, Ontario 10:30 a.m.
Traffic is backed up for several miles on the eastbound 10 Freeway through Ontario and part of Montclair due to construction work. Caltrans is repairing a slab on the 10 Freeway between Campus and Vineyard avenues. The work began this morning and is expected to finish around 3:30 p.m., Caltrans officials said.
Traffic was as far back as Central Avenue in Montclair by about 10:30 a.m.