Extra trains are being laid on to carry triathletes and their bicycles during the London Triathlon this weekend. A 'competitor train' will run every 20 minutes non-stop from Docklands Light Railway Tower Gateway to Custom House for ExCeL stations, and back, during both days of the event.
No other DLR stations will be served by the competitor train.
The trains are limited to a maximum of 50 competitors and their bicycles only, and will not be available to any other passengers - non-competitors and spectators should use standard passenger service trains.
DLR director Jonathan Fox, said: "We're delighted to be supporting the London Triathlon in this way.
"Our special trains will mean an easy journey for competitors travelling to the event with their bikes."
The competitor train service will run on a first come first served basis from 9am to 6pm on Saturday August 4 and 5.30am to 7pm on Sunday August 5.
Event organisers say they will be informing all 12,000 registered competitors of the availability of the service directly.
Competitors can travel using standard TfL one-day travel tickets, or purchase tickets direct from the above mentioned stations.
Normal DLR services will not be affected.
Transport for London, which runs the service, has said that bikes are carried at competitors' own risk. All boarding will be supervised by DLR staff.
While folding bikes are allowed on the network at all times, standard cycles are not normally allowed on the DLR, or most of the London Underground.