The US State Dept has issued a Travel Advisory for parts of Mexico. There is no advisory for Quniana Roo or Riviera Maya.
“Quintana Roo: Cancun, Cozumel, Playa del Carmen, Riviera Maya and Tulum are major cities/travel destinations in Quintana Roo- No advisory is in effect. Exercise caution when traveling south of Felipe Carrillo Puerto or east of Jose Maria Morelos as cellular and internet service are virtually non-existent.”