National Highways Authority Of India [NHAI] — bangalore mysore tumkur expressway

If i am coming from bangalore and want to go to bannerghatta national park then i have to take mysore expressway, pay ₹90 toll and take 2nd exit. But if i miss this exit then i will go toward tumkur and then there is no u turn till next toll. All the u turns are closed with walls being made in between. So to take a u turn i have to pass through another toll gate and pay ₹40 again. This seems they want to extort money from travellers somehow for a simple u turn and it includes fuel wastage as well.