Actually what I want them to do is this:
Leg 4: Double U-Turn. Told to teams at the start of the leg.
Leg 7: Double U-Turn. Told to teams with the Detour clue.
Leg 10: Single U-Turn. Told to teams at the END of the Detour. So the last team standing having not yet used the U-Turn could change the game's landscape.
I like the way you are thinking!
It definitely would add some strategy to the race!
Especially if teams don't expect a third U-Turn board to come up.
If I could add to a season's design:
10 teams, 12 legs.
Leg 1: Non-elimination. Starts out in Texas (the Alamo, maybe?) and teams goes to South America. Peru or Bolivia, perhaps. Even Suriname. 1 Roadblock and 1 Detour.
Leg 2: Elimination. Teams go to the Caribbean. Curacao, The Bahamas, or Trinidad & Tobago.
Leg 3: Elimination. Teams go to Canada. Maybe they'd splice a task or two from the first TARC. Or even better, have an Intersection with the Canadian teams if their filiming coincides. The first Fast Forward would appear.
Leg 4: Non-elimination. Teams fly to the Philippines (either direct or via South Korea I think...). I'm guessing teams would enter through Manila, but I'm actually hoping they would visit Cebu, Vigan, or Davao.
Leg 5: Elimination. Teams stay in the Philippines, but fly to another island. A Double U-Turn would appear. The second Fast Forward would appear.
Leg 6: Non-elimination. Teams go to Oceania (Australia, Palau, New Caledonia)
Leg 7: Elimination. Teams go to Nepal. Second Double U-Turn would appear. Another Fast Forward (maybe they could use that special helicopter that flies towards the summit of Everest?)
Leg 8: Non-elimination or Keep Racing. South Africa. A task that I'd like to show up would use that fact that South Africa has so many official regional languages.
Leg 9: Elimination. Stay in South Africa or go to Namibia/Angola. The fourth and last Fast Forward appears. I actually want this to be a double-length leg (w/ a faux pit stop with no Phil, just a clue box by the mat). So teams had to run 3 legs straight with no pit stop (but probably with HoO) The FF appears in the second part of the double-length leg.
Leg 10: Elimination. Race goes to Europe. Maybe Romania, Croatia, Lithuania, Latvia, or Finland. A Single U-Turn appears.
Leg 11: Elimination. Teams head to either West Europe (Gibraltar, Ireland, Andorra) or Central America (for this one, I'd like them to go to Costa Rica and make a Switchback to the red coffee bean Roadblock in S8 [Hi Tammy!
])
Leg 12: Finale. They could probably go to Chicago as the final destination city, but I actually want to see cross-state driving (like in S8). The memory task would be the one Roadblock, and the finale also have a Detour. So that's 12 RBs, so only up to 6 RBs per team member.