NEW YORK (CBS 2) — A major subway disruption was causing chaos and inconvenience for hundreds of weekend commuters.

The MTA was suspending service on the 2 line between Manhattan and the Bronx and the entire 3 line every weekend through September 13.

For alternate service, riders can take free express and local shuttle buses.

Officials said the changes were necessary because transit workers needed to repair a switch at the 142nd Street junction.