A team time trial (TTT) is a road-based bicycle race in which teams of cyclists race against the clock
Teams start at equal intervals, usually two, three or four minutes apart. Starting sequences will usually be based on individuals’ times in previous events, but in TTTs conducted as part of a multi-stage road race the highest ranked teams will normally start later. Later starters have the advantage of knowing what times they need to beat (and this also makes the event more interesting to spectators).
Unlike individual time trials where competitors are not permitted to ‘draft’ behind each other, in team time trials, riders in each team employ this as their main tactic, each member taking a turn at the front while teammates ‘sit in’ behind. After their turn, the lead rider will swing over, allowing the next rider to take the lead, while the leader goes to the back of the team.