Riders on SEPTA's Wilmington/Newark Line should brace for delays and service disruptions for the next month and a half.

Amtrak is starting a rail-improvement project Monday that will disrupt service on the Regional Rail line through July 2, SEPTA said.

Weekday inbound trains from the Newark and Wilmington stations may be running up to 20 minutes later than usual, according to the transit agency.

Weekday outbound trains to Wilmington, Churchmans Crossing and Newark may be operating 20 minutes later than normal after leaving Claymont Station.

Some Monday-to-Friday train schedules have been adjusted. More details are on the transit agency's website.

On weekends, DART buses will run in place of trains between the Claymont and Wilmington stations. Buses heading toward Center City will leave 25 minutes earlier than scheduled train times. Timetables are available on SEPTA's website. The buses will also run in place of trains between those stations on Memorial Day, which is Monday, May 29.

Amtrak is planning to replace more than 14,000 rail ties and track on a five-mile span between Wilmington and Claymont.