I'm not sure why in the last 15 years they haven't lowered the road a few ft but not make it a 'bucket' to fill with water..
Was doing an Army Course forever ago, & chatting to a Cavalry tankie, who was telling us a story concerning Holsworthy Barracks in Sydney.
The Base is on both sides of the railway line, with a public road crossing between the two sides, under a railway bridge, which is marked as "5.2"m clearance (don't remember the exact number, but something like that). APCs use the road all the time, & their tracks are always chewing the bitumen up, so Main Roads come out regularly, give it another spray & bill Army appropriately.
This particular time, the vehicles were going on Exercise & being moved on transporters, rather than driving themselves, & this bloke had a high-roof Command Vehicle on the back of his truck. Convoy moves out & all is good till he goes to drive under the bridge & Crunch!!!
Naturally, much yelling & screaming ensued, with a lot of it being directed at him for not knowing his vehicle height, ignoring the bridge height warning signs & so on. When he could finally get a word in, he pointed out that he had checked his max. height before leaving & it was exactly 5m, & proved it by climbing up with a tape measure.
Attention then turned to the bridge itself & they put a tape on that to find that it was also exactly 5m! 20+ years of resurfacing the road had added .2m of height to it, but nobody had ever thought to remeasure the clearance height on the bridge