The reason for targetting black drivers was obvious: they are less likely to have lawyers (that this led to it having racist outcomes is a definitely true fact, even if it's unlikely the motivation was race-hatred [the main enforcer of the scheme was himself black]). 

There is an on-going court case over that, and it seems likely that the town will be be slapped severely enough to stop this method of revenue generation - but it took many years to get this far.

So yes, we should move police authority to the local (or possibly provincial) government level, but in doing so we must take care to preserve critical oversight systems - and possibly even avoid localising them at all. It may actually make sense with local-run police to keep IPID as a national-level organisation - which all of them are accountable to.