"Please slow down, and look out," Bridge Foreman Troy Hunt said.
The highway department has dropped speed limits down to 60mph in construction areas. Hunt says most drivers aren't obeying.
"We can run through here with our pickups running 60 and people's passing us like we're standing still," Hunt said.
The city's transportation services director said crews have set up safe work zones with warning signs and cones to avoid accidents.
The death of Jack Luper is a reminder for Hunt and his coworkers to be careful. He was killed after a car hit him on Joyce Blvd in 2011.
Even though troopers say there has not been an increase in accidents, they are keeping an eye out for speeding cars.
"There's zero tolerance for these construction zones when there's highway workers present," Trooper Ted Grigson said.
Highway workers are asking drivers to slow down and be safe so crews can finish faster.