Well ask 6 different Capetownians and they will all have a different answer.
* No money
* a shop that would not sell up
* the ends were not going to meet up so they just stopped
* no need for the freeway so they did not bother finishing it
* someone stole the money
* to give tourist something to ask you about 😉
After a while you don’t notice them, unless there is a film crew crawling all over it!