TWO lanes of the M5 northbound will be closed from 8pm tonight for emergency repairs following an earlier incident.

The lanes will be closed from junction 13 and junction 12 (including the exit slip road at junction 12) after more than 40 gallons of oil were spilt on a 200 metre section of the carriageway following an incident involving an HGV.

Traffic was affected this afternoon as one lane near junction 12, where the oil was spilled, was closed for safety reasons.

Five Valleys resident Tom Lydon posted a warning of bad traffic on Twitter at 4.30pm and advised Stroud drivers to leave the motorway at junction 14.

    #Stroud drivers - avoid M5 north from J13, completely chock-a-block. Come off @ J14 if coming from south, go A38. @benfalconer @hmortimersnj
    — Thomas Lydon (@thomaslydon) February 19, 2014

The damaged section will be resurfaced overnight and all lanes will be re-opened before 6am tomorrow morning.

Road users are advised to allow slightly extra time to complete their journeys.

Drivers wishing to exit the M5 at junction 12 should continue on the M5 until junction 11A, then rejoin the M5 southbound to exit junction 12 on the opposite side of the carriageway.