Washington: If you thought it is okay to talk to your car infotainment system or smartphone while driving then think again. New research has found that it takes up to 27 seconds to regain full attention after issuing voice commands.

University of Utah researchers conducted two studies for the traffic safety charity AAA Foundation for Traffic Safety. One of the studies showed that it is highly distracting to use hands-free voice commands to dial phone numbers, call contacts, change music and send texts with Microsoft Cortana, Apple Siri and Google Now smartphone personal assistants.