The clocks go back at 2am next Sunday morning, which will mean the days getting shorter, as darkness falls earlier.
Mayo County Council's Road Safety Office is urging pedestrians and cyclists to make themselves more visible on roads during the dark Winter nights.
In a move to reduce the death toll on roads, all Garda cars in Co Mayo are to carry a stock of high-visibility vests that can be given out to poorly-lit pedestrians and cyclists.
Be Safe and Be Seen is the message from road safety officer Noel Gibbons.
He's urging pedestrians to wear fluorescent or bright clothing while walking during the day, and wear reflective material at night to be more visible to motorists.
Gardai on mobile patrols will hand out hi-viz vests to pedestrians and cyclists who are not properly visible.
Also, motorists are urged to use their dipped headlights when driving during the day -as this could reduce the number of collisions on Ireland's roads by 20%.