Some drivers for ride-hailing giants Uber and Lyft turned off their apps Wednesday to protest what they say are declining wages at a time when both companies are raking in billions of dollars from investors.
Demonstrations took place in 10 U.S. cities, including Chicago, Los Angeles, New York, San Francisco and Washington, as well as some European locations like London.
But they did not seem to cause much disruption and many riders were still able to hail a car with ease.
The protests arrive just ahead of Uber's initial public stock offering Friday.
Uber hopes to raise $9 billion, putting the company's valuation in excess of $91 billion.
While some drivers went offline to protest, it was still easy to locate a rides in most cities.
In San Francisco, about fifty drivers stood outside Uber headquarters holding signs which read "drivers need to feed their kids" and "you're driving us to poverty."
Drivers in Los Angeles are participating in a 24-hour strike and picket line at Los Angeles International Airport.
The union demands, among other things, increased fares per mile and a decrease in commissions paid to Uber.
Uber, in a prepared statement, said it is constantly working to improve the working environment for drivers.