I tried the 'hold gate' strategy on the very first edits of RainbowRace - it was not appreciated. In this case the trigger either opened a shortcut of 10 to 20 seconds (this wasn't particularly successful because the vehicles were all scorpions, so teamplay wasn't encouraged; I think shortcuts could be encouraged in some longer tracks if a pedestrian path were to be placed so that teamwork benders could pass and allow the footman who triggered the gate to rejoin the bender); or, raised a permanent bridge as part of the track (this also wasn't successful as the majority of players were either confused, or didn't notice/read the message instructing them to trigger the bridge). Maybe a few gates would work out, but I would be concerned that bottlenecks would appear - wouldn't want the first driver to be penalised too much, especially if they'd already fought a couple of battles to get ahead.
I think the map would lend itself well to an aircraft of some design, provided the respawn delay isn't too short and the vehicles continue to be TWBs. Maybe accessible after the second objective considering the nature of the first two?
“We humans do not understand compassion. In each moment of our lives, we betray it. Aye, we know of its worth, yet in knowing we then attach to it a value, we guard the giving of it, believing it must be earned. Compassion is priceless in the truest sense of the word. It must be given freely. In abundance.”