Ferroistmo-owned Tuehantepec line. Several proposals have been made for modernizing the inter-ocean rail connection. See also American-Hawaiian Steamship Company Ferrocarril de Veracruz al Istmo Istmo de Tehuantepec, Oaxaca Isthmus of Panama is the site of the Panama Canal Mexican Federal Highway 185 Nicaragua Canal References External links The Tehuantepec Ship-Railway The Mexican Railways, with information on the current owners (concessions) of Mexican railways. Tehuantepec Landforms of Mexico Geography of Mesoamerica Landforms of Campeche Landforms of Oaxaca Landforms of Tabasco Landforms of Veracruz Sierra Madre de Chiapas Sierra Madre de Oaxaca Sierra Madre del Sur Portages Proposed canals Tehuantepec