Ground travel to Tulum is about as easy as it gets. From the Cancun airport, you can take a bus all the way to the village, getting dropped fairly close to the Tulum Ruins.. There is also regular bus service from the central bus station in Cancun City.
There are almost hourly buses running between Playa del Carmen and Tulum as well as shared “combi” service, which will drop you anywhere you want along Highway 307.
If you have a rental car, driving couldn’t be easier either. From Cancun or Playa, you take Highway 307 all the way there. No turns required.
If you don’t have a rental car, taxis are the easiest way to get around the village. Any excursion to the ruins or Sian Ka’an will usually include hotel pick-up and drop-off.
From Tulum, you can catch a bus either noth or south as well as west to places like Chichen Itza or Merida.