Sharing cars with ride-hailing was supposed to cut congestion. It hasn’t.

There’s a saying that you’re never in traffic, you are traffic. The early vision of companies like Uber and Lyft was that they’d help pull drivers away from using their own cars, but in today’s reminder of the power of unintended consequences, recent studies show ride-sharing services made traffic worse in San Francisco. There are other factors, too — the city has been booming recently, there are more people and more online shopping and food deliveries.