What about…
“When a Driver Drives a Highway Route, that Driver earns 1 Cash and may make one of the first three Inactive Routes in their pool become Active. Highway Routes become Blocked instead of Inactive when Driven.”

, just because it kills Highways.

I would’ve preferred 2+4n, but this is good too.

self kill

Why?

@Pavitra: This Proposal would change the whole description of Higwhay Route into its Scouting Cost. Highway Routes wouldn’t have any effect when Driven, since the

“When a Driver Drives a Highway Route, that Driver earns 1 Cash and may make one of the first three Inactive Routes in their pool become Active. Highway Routes become Blocked instead of Inactive when Driven.”

part would be missing.