Montgomery County officials say they have fixed the traffic signal computer system that caused problems for commuters after it malfunctioned for two days.

County Executive Isiah Leggett says engineers isolated the glitch and reconnected the signals to the central computer and most signals are now responding to commands. The county's Ride On buses will still be free for riders on Friday.

For two days, a computer failure left the county's 750 signals operating outside of regular timing patterns that adjust for rush hour and traffic flow.

Leggett says he plans to expedite a $35 million program to replace the computer system. The six-year program to replace the aging system began two years ago.