What runs between cities without moving?

Answer 1

Things that run in and between cities and towns without ever moving are:

1. roads and highways
2. telephone wires, both overhead and underground
3. telephone (landline) signals
4. electrical wires, both overhead and underground
5. cell phone signals (wireless)
6. cable TV and internet signals (wireless)
7. water pipes
8. sewage pipes

And floating between cities but above them:

1. air
2. clouds
3. clouds producing rainfall
   
4. storms

And between cities/towns depending on time of day or night:

1. sunlight
2. shadows
3. moonlight

Answer 2

A highway.