WSFJ980

Here is a hypothetical.... Let's put repeaters along the interstate highway system spaced at some distance apart that would pretty much assure continuous coverage as someone drives. All the repeaters would be on the same channel with the same tone, but they would NOT be linked in any way. What kind of interference do you think there would be? I'm thinking that one user could not activate more than two repeaters at the same time depending on output power, and the repeaters could not activate each other since the input and output frequencies are different. However, two repeaters could possibly be transmitting the same message at the same time, which could cause degradation of the message heard by users. Would it be that bad as to be unusable or unpractical? Could the interference be mitigated somewhat by changing the distance between repeaters? I would appreciate any feedback.