A man has been arrested on suspicion of causing death by dangerous driving after a three vehicle crash on the M11.
A van and two cars were involved in the crash on the northbound carriageway near the turning for Saffron Walden on the Cambridgeshire/Essex border.
A 47 year old man from Chatham in Kent died at the scene, three other people were injured.
The driver of the van was taken to hospital but later arrested and bailed pending further enquiries.
The road was closed between Junction 10 at Duxford and Junction 8 at Bishop's Stortford for six hours whilst investigations were carried out.
The Highways Agency has confirmed it is considering a ban on lorries overtaking on a stretch of the M11 in Essex.
It comes after Essex county councillors asked for restrictions to be imposed between junctions 8 and 9, near Harlow.
The changes could be implemented later this year.
Road users are advised two road closures are in place for the Tour de France Stage three from Cambridge to London today.
The M11 junction 9a northbound and A11 Stumps Cross southbound, both exit slip roads are closed.
Drivers should plan ahead and be aware the East region is expected to be busy and delays are likely.
The M11 between Stansted and Harlow has now completely re-opened following a chemical spill last night which closed the road since 5pm Thursday.
The road is now open between junction 7 and 8.
Operations Manager for the Highways Agency Caner Okanay said. "The nature of the chemical involved meant that we had to ensure none of it reached the water course. This meant we had to jet wash the carriageway. We would like to thank drivers for their patience last night and this morning."
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 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.
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.