[Lamplighter]

I'm not at all sure Highway 91 is the best example to make your point...

The 10 miles of toll expressway have now been bought out by the Orange County Transit Authority because private ownership caused so many trouble.

Corridor Watch article

A limited partnership was formed to lease the right-of-way for $1 per year, build and operate the toll road lanes. The California Private Transportation Company (CPTC) was granted a 35-year franchise in 1990. Robert Poole a private-public partnership advocate and director of the Reason Foundation transportation studies worked on the creation of SR 91. The highway opened in December 1995 and was operated by CPTC for seven years.
Initially the toll lanes were seen to benefit the public, but that perception ended when a non-compete clause in their contract barred public transportation agencies from increasing highway capacity on other roads within one-and-one-half-miles of SR91. Increasing traffic congestion and the inability to enhance nearby highway capacity reversed the positive public opinion about the private road lanes.

LA Times article from 2002:

The Express Lanes created such a political nightmare that the Orange County Transportation Authority wants to buy the project and put it into the public's hands. Three other toll roads in the county are struggling with lower-than-expected revenue. A fifth proposed tollway in Orange County and another in the Bay Area have been stalled by political opposition and financial problems.