Steps in kerb on new Arbury Road cycle paths

The new cycle lanes on Arbury Road are great but I'm worried the asphalt height hasn't been done to a tight enough tolerance. In places the step from the road up the kerb to the cycle path is quite large, so I'm reluctant to move over from the road to the cycle lane until I reach a flat part.

I may be being over-cautious but I've had bad experiences in the past with falling off and bucked wheels from riding up kerbs at too shallow an angle, and I'm reluctant to experiment too hard!

Does anyone know what the tolerance is meant to be, and whether it has been met here?