Uber Technologies Inc. had 50 percent more cars on the road yesterday than a week earlier, while Side.Cr LLC’s Sidecar service saw a 40 percent jump in rides, the companies said. Flywheel Software Inc. was headed for a record Monday after telling drivers the previous evening to prepare for the impending shutdown of the Bay Area Rapid Transit system, known as BART.

Whether adding mobile technology to cabs, creating connected fleets of luxury vehicles or turning freelancers and part-time workers into private drivers, a slew of local Internet startups have raised more than $100 million in venture funding to breathe life into the taxi and car-ride market.