The incompetent immigration service in Veracruz recently required 4 visits to renew my Mexican resident visa (FM2). Each visit is a minimum 8 hour round trip to downtown Veracruz.
I usually enjoy driving to that city on a monthly or bimonthly basis to shop for stuff that is not available locally, or even catch a movie.
But four times in 30 days is more like an unwarranted crusade. So I like to take the 220 peso round trip bus, leaving at 5.30am, which permits me to read, watch a movie, shop and eat breakfast at Sanborn´s, envy the local Nazi who bought a cheap Mexican passport, and be back in beautiful downtown Catemaco by 3:30pm.
ADO, AU and LOS TUXTLAS bus lines serve Catemaco. A whole mess of other alphabet letters serve the rest of Mexico. Most are good buses, but many are not. Mexico is and has been hyped as one of the best places to visit on a bus in the world.
A few years ago I began a collection of Mexican bus accidents to identify the "bus ran off a cliff or whatever " type accidents in Mexico and South America that kill thousands every year, until I quit after a while because too many internet links refer to the same accident.
The biggest bus drivers in the world fly airplanes. And any accident involving even the teeniest weeniest of crashed planes is not only publicized news but also the subject of extreme research on what caused it. Buses that regularly kill 20 to 50 people are ignored. That is probably because bus passengers not only ride second class transportation but are also considered second class people.
Here is a Google link on "Mexico bus killed". Enjoy it!