Friday’s stage of the Tour de France began with tightened security after Thursday’s terrorist attack in Nice.
Riders observed a minute’s silence in tribute to the victims of the attack.
At least 84 people were killed, with hundreds admitted to hospital, during Bastille Day celebrations in the city after a gunman used a hired lorry to plough through the crowd.
The 13th stage of the Tour began at 9:16am BST after race organisers had debated whether they would cancel the 23.5 mile time trial from Bourg-saint-Andeol to Vallon Pont-d’Arc.
Regional government officials confirmed that they would be taking additional security measures. They added that today’s racing will be dedicated to the victims of the attack.
"We had a crisis meeting with the prefect of the Ardeche department and the gendarmerie. The stage is on," said race director Christian Prudhomme.
"We want this day to be a day of dignity as a tribute to the victims. We asked ourselves (whether the stage should be cancelled) but we think, after agreeing with authorities, that the race must continue."
Race leader Chris Froome will be the last rider out on the course. Another minute’s silence will be held at the finishing line.
