This researcher with the Institute of Economic Studies has some interesting findings. When he and his colleague looked into road quality across cities, they found that the quality of road repair was not tied to the wealth of the neighborhood.
This indicates that the cities do a uniform job in maintaining the roads and are not subject to capture from a particular group. A bureaucracy that works fairly. I speculate that this is because there is nothing particularly intriguing about asphalt. The potential social media controversies or any other profile-rising awareness is simply not going to be generated by the extent of millwork overlays in a year.
Now if there were only more indicators for consistency in city services, then it would be easier to spot the politicians who are simply going after political intreague instead of routine work.