score:5
Having driven thousands of kilometers in Brazil, I have to say that it frequently takes much longer than estimates provided by Google Maps. Even for that would be considered major roads, it is easy for it to take 20-40% more.
Road conditions vary from having brand new smooth parts to unfinished terrain the the same road! The other things to note is, while Brazilians tend to drive as fast as possible, stretches often slow down to a crawl, not to mention before and after every village, police station and speed traps with very low limits.
Some directions gave me that warning but live-traffic maps change routes according to traffic, so I have not encountered any issue, although I did not drive on that particular route you mention. In this case, it seems to be the ferry because the warning disappears when marking 'Avoid Ferries' but that also brings up the time to above 13 hours which probably takes more! One thing to note with ferries is that there is a overhead for getting the ticket, paying, waiting for loading and the scheduled time of the next ferry, plus you might miss the last one that day which would add a considerable amount of time.
Upvote:1
In addition to the helpful existing answers, we found out that there is a village called Bequimão and a neighborhood in São Luís, also called Bequimão. When searching google maps initially, just that second location popped up, which following the traced route would only be reachable by a ferry, hence the extra time.
At the end, we reached the village Bequimão, as we had planned (hotel booked) in pretty much the time given by google maps. The next day we crossed the bay using the ferry to reach São Luís and the Bequimão neighborhood and to continue our journey.
Upvote:6
The roads in this region of Brazil are very bad. This BR-316 is one of the worst roads in Brazil. 7 months ago it was impassable, but it seems to be trafficable. I recommend a lot of patience and add about 2h or 3h to your planning.