Passengers faced delays of up to 10 minutes on trains travelling between Ipswich and Needham Market, after a lorry collided with a railway bridge over Sproughton Road.
The collision meant trains were required to run at reduced speeds over the bridge.
Rail operator, Greater Anglia said a safety inspection was expected to be completed by a Network Rail engineer by 5pm, but that disruption would continue until 5.30pm.
Greater Anglia apologised to customers whose travel plans were affected by the disruption, adding: “Due to a lorry hitting a railway bridge between Ipswich and Needham Market trains have to run at reduced speed on all lines.
“Train services running through these stations may be delayed by up to 10 minutes.”
The first train to be affected was the 4pm from Norwich to London Liverpool Street.
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