Here is the answer to your Uber question:
http://riotimesonline.com/brazil-news/rio-politics/alternative-transportation-controversy-continues-in-brazil/?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+TheRioTimes+%28The+Rio+Times%29
As you will see from the article (dated today), last Friday, the following occurred in Rio, relative to Uber:
On Friday, the city of Rio de Janeiro faced a gridlock with hundreds of taxi drivers blocking the city’s main roads to protest against alternative transportation services. Trips which usually take only a few minutes took hours during the morning hours, with taxi cabs blocking major highways going in and out of the city and to the city’s airports.
Initially Uber services were banned in Rio in September of 2015, but the courts overruled the ban in December, and Uber services have been operating in the city ever since.
On Monday, Rio’s Mayor Eduardo Paes told journalists that his administration would not stand for another protest as that seen on Friday. “Everyone has the right to protest, as long as they don’t block the roads,” said Paes threatening to revoke taxi licenses if a similar situation every occurs again.
According to Paes the effect of the protest was negative for taxi drivers, “Instead of the population supporting these taxi drivers, what it [protest] did was to tarnish their reputation and make the population angry at them.”
Brazilian Daniane Ikenami, who works with InterNations – a global network of expatriates – explained why she prefers using Uber, “The first time I used Uber was with a friend who was visiting Rio, one month ago. Although, I already knew about it, I wasn’t sure to give my credit card previously.”
Based on the article cited above, initially, cab drivers in Rio got sympathy because of losing customers to Uber. However, because of Friday's intentional traffic congestion and gridlock they caused with their protest (while using their cab to block highways and streets), cab drivers lost ground for their support.
By the time you get to Rio, it is anyone's guess how the Uber situation will unfold.
Stayed tuned.