Try to cross them at an angle on thin tyres and the front tyre can get snatched into line with the tramlines, throwing you off, or the back tyre can skid sideways along them, throwing you off, or the whole thing can railroad you into any obstruction too close in front of it, which is why they shouldn't be installed within 4m of a bend or barrier. Even with thicker tyres, it can make the handlebars skip around unpleasantly or subject the back wheel to buckling forces. And finally, the tiles almost never remain level with the adjacent tarmac. No cycle-friendly place would install them on cycle tracks IMO.