Merida_(Mexico) is a city in Country.
North/South/West/East towards Other City
To Chichen-itza, Valladolid, Tulum, Cancun To get out of the city to the Periferico & the highway 180, take a San Pedro bus at calle 54 x 67 x 69 just outside San Benito mercado. The cost is 7 pesos (August 2016) & it'll drop right on the highway somewhere around the gas station. There's also a parallel 180D & according to Google maps it's faster for the coast cities but cannot comment on how busy it is, was taken by 180 myself & somehow I believe foreigners on the road to Chichen-Itza would look more logical.