Exit 89 for... itself?
https://www.google.com/maps/@-22.5556746,-43.2360965,16.95z
Also, where's that thread for highways with lanes far apart from each other? I know there was a pre-existing one for that, featuring I-8, I-64 between Richmond and Williamsburg, and Mexico Federal 40 east of Plaza de Cobro La Cuchilla. Oh well, guess I have to start a new one.
I... I don't even know wtf is going on there.
Also, the thread I think you mean is something similar to "longest time you don't see opposing traffic" .
It looks like they were trying to add southbound lanes to the northbound side and then just gave up.
For an economy as large as Brazil's you'd think they're roads would be a bit nicer.