Road safety chiefs in the west have expressed concern about a new game among young motorists which they warn is putting many lives at risk.
They have said young drivers are engaging in a "beat the clock" game where they try to trim minutes off the estimated journey times on SatNavs.
The practice is said to be most common among young drivers, but middle-aged drivers and some pensioners are also engaging in this game.
Last week, Gardaí expressed serious concern over a rise in road deaths in the west over the past two years, which is running contrary to the downward trend nationally.
Of the 35 deaths on Irish roads this year, 20 were in the west , with speeding in 80 and 100 kilometre zones identified as a major factor.