London's Edgware Road underground station, the scene of one of the bombings on 7 July, has reopened.
The station was damaged when a bomb was set off on a Circle Line train, killing six people.
District Line trains are running again but the Circle Line remains suspended. There are still restrictions to the Hammersmith & City Line.
Platforms and trains at Edgware Road remained virtually empty during the usual morning rush hour.
Some may have avoided the station, which showed no sign of the devastation caused by the blast, due to nerves while others were not aware it had reopened.
Carpenter William Mascimento, from Camden, north London, was one of just two people to take the 0705 BST train from Edgware Road to Wimbledon.
The 22-year-old said: "I am worried, I will admit it - I just won't show it. But at the same time I have got to get to work and carry on with everyday things."
Five workmates, who usually accompany him, opted to stay away from Edgware Road station and took alternative routes.
Howard Collins, London Underground's service director, said: "The reality is that obviously people are cautious but our job is to give confidence back to people, to work out the best way to ensure that London is a safe place to travel.
"Our number one aim is to restore the service so that customers are confident the Tube is running as before.
"We have had great support from London Underground staff and Metronet engineers who have worked round the clock to reopen Edgware Road station."
'Won't be defeated'
Mr Collins said he expected the station to be quiet on Friday but that it would get busier when the Hammersmith & City Line opens on Tuesday.
Andrew Lezala, chief executive of Metronet - one of the private maintenance firms that maintain the London Underground, said: "We're determined to help get the capital back on its feet.
"Londoners won't be defeated by the terrorists."
Engineers got the station repaired just eight days after it was handed back by the police.
Police from the anti-terrorist branch gave back control of Edgware Road to London Underground on 20 July, after the bombed carriage was lifted out by crane the previous night.