Montebello Boulevard Road Diet Construction is snarling traffic in Montebello, CA

Drivers may need an extra 15 to 20 minutes to get through the area, she said.

Sequel Contractors of Santa Fe Springs has the $5.8 million contract to do the work that also will include the addition of a bike lane, median island and new lights.

Already, the medians have been put in — landscaping still needs to be added — sidewalks have been repaired, and some of the accessibility ramps have been added, Public Works Director Danilo Batson said.