With no phone, email or message services from their favourite comms device, drivers in Dubai and Abu Dhabi had to concentrate on their driving for a change.
Accident rates dropped 40 percent in Abu Dhabi, and 20 percent in Dubai. In that first Gulf state, there is normally a fatal accident every two days, while Dubai usually records a traffic accident every three minutes.
Two weeks ago, Abu Dhabi police warned that in future road incident court cases, they would use the electronic evidence of users' phone records to pinpoint if the use of phones while driving was a factor.