What part of the law did the Court find the exception in?

“[t]his section does not affect the authority of an entity authorized by law to take private property through the use of eminent domain for: (1) transportation projects, including, but not limited to, railroads, airports, or public roads or highways…” 

So… what are legal types saying? potentially all roads are excepted from the Kelo related limitations on eminent domain.

KMS RETAIL ROWLETT, LP v. CITY OF ROWLETT

Owners Counsel | Texas: Transportation Projects Exempt From Post-KeloLimitations On Eminent Domain Power