The experience of moving through San Francisco in a car has gone from slow to crawl.

Congestion in the Bay Area flagship city has grown increasingly worse, and a new report by the San Francisco County Transportation Authority placed a sizable portion of that blame on ride-hailing services like Lyft or Uber.

“It appears that TNCs (transportation network companies) contributed approximately 50 percent of the overall increases in congestion in San Francisco between 2010 and 2016,” the report reads.