A major redesign of a “dangerous” East End roundabout where two cyclists died within weeks of each other was today unveiled by Transport for London.

Mayor Boris Johnson was urged to take action after Brian Dorling, 58, and Svitlana Tereschenko, 34, lost their lives by colliding with lorries at Bow roundabout late last year.

New plans uncovered today show a traffic light system which would give cyclists an early start on green lights, enabling them to navigate the roundabout before other traffic.

Another proposal is to reduce the flyover from two traffic lanes to one in both directions to make way for dedicated cycle lanes for the first time.

TfL also wants to install cycle lanes on the east and westbound approaches of the roundabout, with advanced stop lines made deeper to ensure that cyclists have a clear visible space in front of any traffic.

The measures come after campaign groups expressed major concerns that cyclists were being forced to contend with other traffic at the junction, putting their safety at risk.

Shortly after Mr Dorling’s death, his wife, Debbie hit out at the design of the cyclist lane.

She said: “The position of that blue line put Brian in a position of danger.”

The roundabout is part of one of the mayor’s flagship cycling superhighways for the capital.

After the two tragedies, Mr Johnson ordered a review of all of London’s superhighway schemes.

Leon Daniels, managing director of surface transport at TfL, described the spot as a “key roundabout for cyclists” and added: “We remain absolutely focused on delivering improvements before the 2012 Games.”

John Biggs, London Assembly Member for the area, today welcomed the plans but said they needed to go further, as safety for pedestrians is still an issue.

Mr Biggs, who has campaigned on the issue for two years, said: “This junction does nothing for pedestrian safety.”

TfL is now consulting with cycling groups and local authority transport chiefs over the plans.

Work is expected to begin in the next few months.