OAKLAND (CBS NEWS) — The traffic and navigation app Waze launched a new carpooling service Tuesday across California that allows passengers to request a ride with someone already driving along their route, costing them only a share of the gas money.

Other ride-hailing apps like Uber and Lyft have already connected millions with their carpooling options.

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But long before they came along, there was casual carpool.

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The grassroots commuting option has sprung up in places like Washington and Houston, reports CBS News correspondent John Blackstone who recently tested the concept where it all started — San Francisco.

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