The study will focus on widening the M11 between Junctions 6 and 8 to four lanes and the West Anglia Main Line between London and Cambridge, including a four-track railway running from Tottenham Hale to Cheshunt.
However, EERA regional transport planner Tim Bellamy told NCE: "There are other routes that need to be assessed as well, such as the A12 and the A120. Also, the M11 beyond Junction 8 towards Cambridge is only dual carriageway, so there needs to be consideration of what can be done beyond Junction 8, otherwise you would be creating a bottleneck."
On rail, Bellamy said the need to enhance capacity on the Great East Anglia Line from London to Norwich was just as great following a modelling study by Atkins that showed the route would become increasingly overcrowded.
Announcing the study, Kelly said: "This work will take account of the forecast growth in the region… if this work determines that widening the M11 is needed, it has been agreed that Stansted Airport owner] BAA would contribute to the overall costs."