carpooling
US /ˈkɑːrˌpuː.lɪŋ/
UK /ˈkɑːrˌpuː.lɪŋ/

1.
an arrangement among a group of people to travel together in one car, sharing the cost and often taking turns driving
:
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We save money on gas by carpooling to work every day.
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The company encourages carpooling to reduce traffic congestion.
1.
to travel together in one car, sharing the cost and often taking turns driving
:
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They decided to carpool to the concert to save money.
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Do you want to carpool with me tomorrow?