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A software glitch affecting ride scheduling has caused service disruptions for users of Metro Mobility, a service that provides door-to-door rides for those who are unable to use traditional buses or trains, officials said.

The glitch prevented drivers from the three companies that provide the service from accessing information telling them when and where riders are to be picked up, said Gerri Sutton, assistant director of Metropolitan Transportation Services.

The problem cropped up Sunday and continued into Monday. Not all trips were affected. By Monday evening Metro Mobility's scheduling system was restored. Though staffers continue to schedule rides, a slowdown in the system means that it was taking longer to schedule rides and telephone hold times were longer than usual.