Excessive debris on cycle lane

I have been reported this ongoing issue various time and is time for a clear long term solution to be implemented as it is very inconvenient for the cyclists. The soil and gravel from the grass area between the cycle lane and pavement keeps coming onto the eastbound cycle lane causing a slippery surface, high chance of tyre punctures as well as gravel being thrown into the passing by cars or viceversa, into cyclists or pedestrians. Please kindly setup one row of tarmac/ concrete blocks between the grass area and cycle lane to stop the gravel and soil coming onto the cycle lane This applies to various areas along the cycle lane on both ways from the Henlys Roundabout to Riverbank Way roundabout