How do you get a vehicle in Battlefield 3 multiplayer

In Battlefield 3 multiplayer, vehicles are available in the Conquest, Rush and Squad Deathmatch game modes on all maps except Operation Métro.

Before a multiplayer game begins, players have the option to spawn inside some vehicles such as jets or helicopters. Alternatively, players can spawn and once the game begins, run towards and enter a vehicle, such as a tank or jeep.