Trying to track down a truck

I live near the intersection of Royal Boulevard and Mountain Street. Several times a week at 4:30 a.m., somewhere nearby a truck backs up repeatedly, with the corresponding beeping back-up warning. The acoustics of the canyon make it seem extremely loud and also make it very difficult to figure out where the beeping is coming from — my best guesses are the Civic Auditorium or Glendale Community College.

Does anyone have any idea where this could be coming from? I’m sick of being awakened at 4:30 and don’t want to wear earplugs to bed every night, so even knowing the trucks’ schedule would be helpful.

Mike Abrams

Glendale