The primary highways of Ecuador are designated with both a name and an alphanumeric
designation. The highway designations begin with the letter E followed by a number.

If the highway is a trunk highway (travelling north to south), the number is odd. They are
numbered from smallest to largest from the west to the east.

If the highway is a transverse highway (travelling east to west), the number is even. They are
numbered from smallest to largest from the north to the south.

North-South

• Pacific Route (E15), also known as the Sun Route (Vía del Pacífico or Ruta del Sol)
• Coast Road (E25) (Troncal de la Costa)
• Highland Road
  Ecuador Highway 35
  Ecuador Highway 35 , officially named "Troncal de la Sierra" but colloquially known as "La Panamericana", is a primary highway in Ecuador. This road is Ecuador's portion of the Pan-American Highway...
  
   (E35), the Pan-American Highway
  Pan-American Highway
  The Pan-American Highway is a network of roads measuring about in total length. Except for an rainforest break, called the Darién Gap, the road links the mainland nations of the Americas in a connected highway system. According to Guinness World Records, the Pan-American Highway is the world's...
  
  (Troncal de la Sierra)
• Amazon Road (E45) (Troncal Amazónica)

East-West

• Frontier Transverse route (E10) (Transversal Fronteriza)
• North Transverse route (E20) (Transversal Norte)
• Central Transverse route (E30) (Transversal Central)
• South Transverse route (E40) (Transversal Austral)
• South Transverse route (E50) (Transversal Sur)