1. The lane on a highway or expressway designated for faster-moving traffic, typically located on the left side of the road
Stay in the fast lane only if you are passing another vehicle.
Mantenha-se na pista rápida apenas se estiver ultrapassando outro veículo.
2. A metaphorical reference to rapid progress or advancement in life or career
He is on the fast lane to success.
Ele está na pista rápida para o sucesso.