G.M., Expecting Rapid Change, Invests $500 Million in Lyft

The founders of Lyft, the ride-hailing service, have long imagined that the future of transportation would involve fewer cars on the road. Now General Motors is helping the start-up reach that goal. Lyft announced on Monday that G.M. invested $500 million in the company, or half of its latest $1 billion venture financing round. The funding, which recently closed, values Lyft, which is based in San Francisco, at $4.5 billion.

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