Concerns about high winds led to the planned closure of a bridge two days before during Storm Ciara was expected to hit.
Highways England initially said the A14 Orwell Bridge at Ipswich, Suffolk, would be shut for 15 hours, it increased that to 17 hours, from 02:00 GMT to 19:00 on Sunday.
The agency said the closure was subject to change, depending on forecasts.
An amber weather warning has been issued for eastern England on Sunday.
The amber warning, from the Met Office, means there is the risk of injuries and danger to life from flying debris, damage to buildings, and power cuts.
Highways England makes the decision to close the bridge when wind speeds are likely to exceed the threshold of 50mph (80km/h), depending on the wind direction.
SUNDAY INFO THREAD for Orwell Bridge #StormCiara - Our crews will be in place to close the bridge at 0200 Sunday 9th Feb. The winds are expected to breach thresholds at 0400 Sunday 9th Feb so the bridge will be closed by then. 1/3— Highways England (@HighwaysEAST) February 8, 2020
Ipswich Central, the business organisation, has previously estimated a bridge closure costs the town's economy £1m per weekday.