Sadly I have to work in one of the sectors. It is very common for geometric design of roadways. I think it is a result of State Departments of Transportation buying into the system and never wanting to change.
The only way to change that- is to actually pretend alternatives are not used- meaning they have to mimick the output exactly- even the flaws. Then after 5 years or so- the department anounces- oh- and by the way, we completely replaced xyz.