[11] On June 14, 1959, the section from Reading to Wilmington Junction became freight-only, and Haverhill commuter trains as well as intercity service from New Hampshire and Maine were rerouted over the Wildcat Branch and the lower Lowell Line.

[2] The Salem Street stop on the Wildcat Branch opened to replace North Wilmington on the mainline.

Like the similar stations opened soon after on the Fitchburg Line, North Wilmington received a low asphalt platform and a small parking area, with a bus shelter added for passengers.

The initial MBTA investigation indicated that the crossing gates did not function due to an error by a signal technician who was performing preventive maintenance.

[13] Because the platform is close to Route 62, trains block the road when stopped, which causes delays for emergency services.

[15] In January 2021, the MBTA received a $1 million Federal Transit Administration grant to relocate the platform to avoid blocking Route 62, as well as to make the station accessible.