There are no signs at the buss stops. There are no route maps at the bus stops. There are names of the destinations printed on the front windows, but again, unless you know the local naming system-they are useless. Also the printing is small and at night unlighted. This is another example of the bureaucrats not giving any attention to what is obviously a poor and frustrating system.
Bureaucrats drive cars.
However, there is a solution. Have the names of the locations that you want to visit, written down on pieces of paper. One location on one piece of paper. If you like, sequentially number them. If your Spanish is poor, show the paper to people waiting for the bus.