Start by drawing another card from the draw pile. If you have another Safety Card, you may play it and still have another turn, and so on. If you have a Speed Limit Card, you may play it in front of an opponent, even though your opponent has not yet had a chance to play and thus has no Roll Card exposed. This play starts your opponents' Speed Pile. If you can't make any one of these plays, you must discard one card, face up, thus starting the discard pile.
Discarded cards are out of play for the rest of the hand.
When the first player has finished his or her turn, the second player starts by drawing a card. As the second player, you may then make any one of the plays already described, with two additional possibilities. If the first player played a Roli Card you may play a Hazard Card on top of it. If the first player played a Speed Limit Card, you may play an End of Limit Card on top of it. As the third player, you play as a partner of the first player and don't start any piles of your own.