Personally, I think it would be really cool if two or more players (max of four) could combine their mounts to create a faster chariot.
Practically speaking, one could invite another player to combine mounts through the player interaction wheel.
Each additional mount pulling the chariot would result in an increase in travel speed. It would also depend on each mount's native. Four player chariots could have a 100% speed increase.
This would be wonderful in long travels across Cyrodiil. To balance the speed increase, rapid maneuvers could be disabled while in a chariot and players could be more vulnerable to being dismounted while in a chariot.
Edited by Galenus_of_Pergamon on April 6, 2017 9:28PM 14 AD Characters all 730CP+ (more info coming soon)
Vivat Veritas
Combining Mounts to Make a Faster Chariot? 16 votes
Yes, combining mounts with other players to make a faster chariot would be awesome.

2 votes
No, mount speeds are fast enough already, so we don't need chariots. Long travel times is the price you pay for dying in Cyrodiil
Maybe, with some modifications to the idea (please explain below)