Pepwave offers up a Wi-Fi bridge intended for vehicles: The several models of Pepwave CarFi--sounds like they're borrowing my mode of naming Wi-Fi market segments--have no backhaul, like a cell router. Rather, they're designed to hook into wide-area Wi-Fi networks, providing consistent relayed service in a car or bus as it moves about a coverage area. The models are designed for mounting and use a standard 12-volt power supply and external antenna. Three 2.4 GHz models come in 100 mW, 200 mW, and 400 mW versions; there's also a single 802.11a/5 GHz model.