Esme Vos at MuniWireless reports that Arizona has been testing VoIP via wireless on highways, and that telephone calls have been made successfully at speeds of 80 MPH. The effort uses equipment from a company called RoamAD. The mesh network system is able to hand off the signal from one cell to another without losing the telephone call.
I've been following mesh networks for some time, and I think the technology, which is inexpensive and ideal for covering large areas with a WiFi blanket, is poised to catch on.
One of the weak points in the incumbent opposition to municipal wireless networks is the fact that a WiFi blanket is likely to emerge as a key public safety technology. On top of that, community-regional WiFi blankets are going to save taxpayer dollars. Laptops are already common in patrol cars. But imagine if a police officer, at the scene of an accident, could not only videotape the scene, but transmit it in realtime to a server back at the police station, where it could be archived, along with all the paperwork, which would also be transmitted in realtime from the scene.
Drunk driving enforcement could use the same systems, archiving roadside sobriety tests as evidence for a court trial. Fire, rescue, and paramedic teams could also use 24/7 realtime network access to improve response times and save lives.
And if a community is provisioning a wireless network, why not design it so citizens can use it as well?
As always, I think that communities ought to be making the infrastructure investments (duct, towers, tower sites, colocation facilities) and issue RFPs to the private sector to provision and manage the network. That way communities get what they need while creating private sector jobs. Why would you want to do it any other way?