The 34th Airtricity Dublin City Marathon takes place today and will make it's way through Dublin city centre.
The Marathon starts at Fitzwilliam St and will finish at Merrion Square North between midday and 5pm.
Organisers expecting over 14,500 people to tackle the 42km course.
The route will see participants travel through the city centre, through the Phoenix Park and along the N11/Stillorgan Rd and Merrion Rd.
A number of city centre streets are closed and the following routes have diversions in place:
Motorists travelling in on the N1/Swords Rd will be diverted at the Dorset St/Upr Gardiner St jct.
Traffic on the N2/Finglas Rd wishing to access the city centre is advised to use the M50 and then N4/Lucan Rd between 8:30am and 10:30am.
On the N3/Navan Rd, traffic will be diverted away from the NCR and motorists are advised to use the M50 and the N4/Lucan Rd between 8:45am and 10:30am.
The N4/Lucan Rd is open all day and will be unaffected by the marathon. However, delays can be expected on the North Quays and at O’Connell Bridge between 8:45am and 9:45am when the marathon crosses the Liffey.
Motorists on the N7/Naas Rd will experience disruption as there will be restrictions in the Dolphins Barn/Inchicore area from 9am to 12:30pm. Use the N4 instead.
Traffic will be filtered through the race on Long Mile Rd and Crumlin Rd.
There will be no disruption to N11 traffic, except at the slip roads for UCD.
On the Rock Rd traffic will be diverted at the Merrion Gates or onto the N11.
On the N81, there will be no access to Templeogue Rd between 9:30am and 1:30pm.
There will also be closures in Phoenix Park.
Dublin Bus will operate a number of diversions to services.
There will also be some disruption to rail services.
Engineering works on the line between Connolly Station and Malahide in Dublin will affect DART, Commuter and Belfast Enterprise Services until Monday.
Met Eireann is warning of strong winds and thundery downpours over the course of the day.
Race Director Jim Aughney says the numbers competing is a testament to the ongoing success of the event.
These runners are excited to take on the 26 mile track, raising money for chosen causes in the meantime.
