Pepwave Mobility can keep an active Wi-Fi connection at up to 75 mph, the company says: The device is the first mobile router I'm aware of that's designed as a separate product, rather than as part of an integrated package that includes propriety elements and often installation and maintenance. They have no per se competitor that I'm aware of for this segment. The company plans to sell the unit to service providers and others starting at $495 for a 100 mW radio (European market), with higher prices for 200 mW and 400 mW radios (U.S.).
Enabling mobile communications in commuter vehicles was supposed to be one of the ancillary benefits of city-wide wireless networks, but it's been mostly ignored. Most commuter-based Internet access over Wi-Fi uses satellite or cellular backhaul.