Wouldn't it be substantially cheaper to basically just grind a channel into the pavement and then have people charging put a rubber mat on top of it? I feel like I could do this in a couple of hours with the tools in my garage.
You don't need the rubber bumps to be literally zero height, a few mm is fine, you just don't want it to be a big effort to get over with a pram/wheelchair.
Looking at it holistically though, it's probably the wrong place to optimize anyway because in practice most streets picked at random will have more obstacles in the way of wonky tiling due to subsidence or weathering of a pavement that's 50, 100, etc years old.
You don't need the rubber bumps to be literally zero height, a few mm is fine, you just don't want it to be a big effort to get over with a pram/wheelchair.
Looking at it holistically though, it's probably the wrong place to optimize anyway because in practice most streets picked at random will have more obstacles in the way of wonky tiling due to subsidence or weathering of a pavement that's 50, 100, etc years old.