The route (may vary on the day) keeps mainly to the A23 (London to Brighton Road).
From Hyde Park and Apsley Arch the route takes Hyde Park Corner, Constitution Hill and for 2014 The Mall, Horse Guards Road, then picks up Birdcage Walk, Parliament Square and Westminster Bridge. In 1996, 2012. 2014 and on, the cars crossed Hyde Park Corner and through Wellington Arch.
From Westminster Bridge the route goes under Waterloo Station, then to the next junction which is the A23. In the last few years the route follows the river till Lambeth Bridge where it turns left away from the river and then on to the junction, turns right onto the A23.
On the A23 the route passes through South London to the outskirts of Croydon. New to 2010 and on, the route now leaves the A23 at the junction with the A236 to head to "Old Town", then on to the A235 and rejoins the A23 at Purley. This now misses the Croydon traffic free Town Centre. The route continues on the A23 to Redhill, Gatwick and Crawley for the official coffee stop.
Please note: - The drive down Constitution Hill, in front of the Palace and from 2014 The Mall is for Veteran Cars only. Constitution Hill and The Mall are closed to normal traffic every Sunday.
The route through Croydon now means that the route is now open to all traffic. The veteran cars are allowed to use London's bus lanes on the day all the way to Coulsdon. Drivers of "Modern" vehicles are advised to check times of each section before driving in bus lanes as the times do vary.
After the coffee stop the route leaves the A23 for the B2114 to pass through Handcross Hill, Hammer Hill, then B2115 for Whitemans Green, B2036 for Cuckfield, A273 for Burgess Hill and Clayton Hill, then rejoins the A23 at Pyecome for the run into Brighton.
Up to 2014 the official finish was at Preston Park where the cars are required to stop and then on to the sea front and the "Finish Line", on Madeira Drive. In 2015 and on, it's straight on to the sea front. In 2012 the finish was moved nearer to the roundabout by the pier.
On the day the Veteran cars are allowed to use Brighton's bus lanes. Like London (on the day) their use is only for public transport and veteran cars. "Modern" vehicles use the one-way systems.