When I was taking Nexus South yesterday it was quite slowwith a big line up. As a result the traffic was tight and rain had filled in the road bumps maiking the road surface hard to see
There are a series of very large and very deep pot holes in the middle of the Nexus lane about 50 metres north of the border crossing into the US.
I got my front wheel caught in one and while I didn't dump the bike it was a bit of a strain to get out of the hole upright. THey would knock down a bike if your were 2up and didn't see them
I mentioned this to the border guard and he said be careful we have had a few people break car rims and get flat tires in those ruts.
BTW it would not be worth it to make a scene or rant on this - it is the border they don't care about this stuff.