Here's how long it takes on average before you hear: 'Are we there yet?'
They have worked out how long, on average, it takes for a child passenger to ask: "Are we there yet?"
It is part of information gleaned from a new survey around what goes on in an Irish family's car.
The Enterprise Rent-A-Car research discovered there is little by way of conversation. Children, it seems, are "glued" to their devices on journeys; parents struggle to get a word out of them.
One-in-three say the children play on tablets "for hours on end" in the car - and elsewhere. Even though 26pc are worried about the impact on children's health and fitness of playing on tablets or phones for so long, they feel helpless to do much about it.
Only 15pc of parents have become angry over what they see as excessive use of devices.
George O'Connor, managing director Enterprise Rent-A-Car Ireland, says: "With the emergence of mobile technology . . . most parents accept that devices are part of the journey now."
The most popular activities for those aged under 18 on long journeys, are either playing games (45pc) or watching movies on a phone or tablet (38pc). Despite that, a minority (24pc) still join in on the old reliable i-spy game.
But some things never change, tablet or not. The dreaded question 'Are we there yet?' is inevitably asked during all car journeys.
And the Enterprise research found it takes a mere 38 minutes for a child to pop the question.