I stumbled upon maps of many of Saltillo’s bus routes!
This HAS to be shared!
For those looking to hop on a bus for the first time, it costs $11 a ride (July 2018). So yes, if you have more than 2 people, getting a taxi is more economical. There are discounts for prepaid cards, students with prepaid cards, seniors with prepaid cards, and handicapped people with prepaid cards.
For full disclosure, I found the maps at transparencia.saltillo.gob.mx
Can’t find the route that runs by your house? Maybe transparencia.saltillo.gob.mx will have it! (We can hope.)
Or, hop on a bus and see where it takes you!