The inside lane had been closed following a collision on Sunday (17 April) involving a lorry that left the carriageway and damaged the nearside barrier.
Highways England and its contractors are continuing to work hard repairing the barrier, which requires a bespoke barrier to be manufactured.
The lane has been reopened to allow all four lanes to remain open during the day, until the new barrier can be installed.
A temporary barrier has been installed to protect the bridge barrier, to prevent a vehicle from falling from the bridge. In order to safely reopen the inside lane a 50mph speed limit will remain in place.
It is anticipated that the new barrier will be installed later this week or over the weekend, using overnight lane closures. Once installed the temporary barrier and 50mph speed limit will be removed.
Highways England provides live traffic information via its website, local and national radio travel bulletins, electronic road signs and mobile platforms, such as Android and iPhone apps.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.