The Highways Agency is now estimating that the M11 between Junction 8 and junction 7 will completely re-open at 10.45am.
The road between Stansted and Harlow has been shut southbound since 5pm Thursday evening after a chemical spill.
The M11 southbound entry slip road at Junction 8 remains closed at the moment.
The Highways Agency says it hopes the M11 between Stansted and Harlow will re-open by 9am on Friday.
The road has been closed since about 5pm on Thursday when a lorry overturned spilling chemicals.
The northbound carriageway opened at 5.50am on Friday but the southbound stretch was still closed during Friday's rush hour.
The road surface was covered with a chemical foam and at one point firefighters had to impose a 150 metre exclusion zone.
“The nature of the chemical involved has meant that we have had to ensure none of it reaches the water course and so the clean up operation involves jetwashing the carriageway surface and then using gulley suckers to ensure all liquid is removed and can be safely and environmentally disposed of away from the scene."
The M11 motorway in Essex is still closed southbound after a lorry overturned and spilled chemicals across both carriageways during Thursday evening's rush hour.
The HGV was recovered overnight but the Highways Agency says a "complex and specialised clean-up operation continues."
There is a diversion in place with southbound vehicles leaving the M11 at junction 8 at Stansted. They are directed along the A120 westbound towards Puckeridge and then the A10 southbound and the A141 towards Harlow where they can re-join the M11 at junction 7.
Drivers should allow extra time for their journeys. The Highways Agency hopes the road will be re-open by 9am. The northbound carriagway opened at 5.50am.
The M11 motorway in Essex has been closed after a lorry overturned and spilled a large amount of acid across both carriageways.Read the full story ›
Firefighters are working at the scene of a lorry crash on the M11 in Essex. A lorry has overturned and is now on its side. The lorry has spilled a large quantity of chemicals.
The road has been closed in both directions.
Essex Fire Service say the chemicals have been identified as melamine formaldehyde resin and phosphoric acid. Crews are standing by awaiting scientific advice.
There are long delays on the M11 in Essex tonight after a lorry full of glue overturned closing the road in both directions between J7 A414 / B1393 (Harlow) and J8 A120 / B1256 (Stansted Airport / Bishops Stortford), with congestion on Northbound to J6 M25.
Essex Police say that people near the scene must stay in their vehicles as the fumes are hazardous to health. The road is likely to remain closed late into tonight
Severe delays and road closed due to spillage of glue and overturned lorry on M11 in both directions between J7 A414 / B1393 (Harlow) and J8 A120 / B1256 (Stansted Airport / Bishops Stortford), congestion on Northbound to J6 M25.
Essex Police say that people near the scene MUST stay in their vehicles as the fumes are hazardous to health. The road is likely to remain closed late into tonight
Disruption on Greater Anglia between Cambridge and Ipswich due to signalling problem at Dullingham.
All lines are currently blocked and a replacement bus service is being arranged. Greater Anglia currently do not have an estimate as to when a normal service will resume
A12 both ways closed, delays due to overturned lorry and fuel spillage at A1152 Woods Lane (Melton Roundabout). Quite a lot of fuel on the road, and the lorry on its side. Some traffic is already diverting through Melton and Woodbridge on the B1438.
One lane blocked due to broken down vehicle on M11 Northbound between J9 A11 Saffron Walden and J10 A505 (Duxford).Sensors show no delays.