No cameras on I-235,Windsor Heights is told

There's no stopping greed, unfortunately.

Fred

Aren't interstates maintained by the state rather than individual towns? Wouldn't that make speed cameras a state decision rather than town decision?

In Ohio, it depends on the number of feet of roadway within the municipality. I believe it is a half a mile of roadway within the municipality before the city or village has the right to enforce traffic laws on the stretch of road. However, the state still retains the right to set the speed limit on the roadway. So, the city or village may have the right to install speed cameras on the section of road. However, I'm not sure about other states.

Des Moines has E/B cameras as traffic enters the city. Yet Windsor Heights can not have W/B cameras as traffic enters their city.

It all depends on political power and Windsor Heights has little. If you are doing the speed limit you are very slow.
That stretch of road has those 4000+ speeders a day and they call it a good week if they only have 2 accidents a week in that half mile stretch.
Drivers figure that the city of Des Moines will not put radar on the last mile of interstate and Windsor Heights does not on its' mile stretch so at times it is a racetrack.
Des Moines did not have to have approval for its' radar is more than a mile in the city limits.