Many freeways have been built as toll roads, that's how the construction is paid for. I can't speak to South American versions, but in the US it's a common strategy. Most toll roads until recently are tolled for a period of time (say 30 years) until the bonds are paid off. Don't know the deal in Indiana. In CA many of the toll roads built in the 90s went bk because the revenue was not enough for bond payments.

Because the federal gas tax, once used for freeway construction, is not indexed, the revenue has been going down over time. Many states are now using toll roads or toll lanes to raise revenue for freeway construction. Texas and CA are both doing this.

This graft that this Weissmann character was involved in is another financial crime on a ;large scale.