The "A car goes basically as Hillbilly saids, the confusion is that there are two directions to most routes.
Because of one-way streets, etc, (Del Sol is one way and the main shopping area of Santiago), the "A" to someone not knowing the route would think there are two separate "A" routes.
The "A" you took from Jumbo to the city would come down 27th of Feb, turn right (Very bad turn) to the city, pass the park with the cargated metal around it, a left then right around park, then turn left to go up Del Sol as HB said, then after making a left a few blocks before the Monument, it would past the main Santiago Hospital and turn right on 27th of Feb., just before Nacional supermercado (3blocks?), it would then turn right and then left, thus passing Metro.
The other direction comes down (I believe it is Duarte) (Which becomes one way just past Metro) to the city and turns right on Restaruante and passes El Encanto, makes a right turn to get to 27th of Feb. where it makes a left, and will pass Jumbo and Caribe Tours.
PS: There are TWO Caribe Tours, and unfortunately to add to the confusion they are BOTH on 27th of Feb. One is near Los Colinas and the other is close to Metro.
Hillbilly and I are saying the same thing, I just tried to add a few extra words.
That's the best I can explain without having an actual map handy to name all the streets. LOL
