Altai region in the space of transcontinental railway corridors: from Turksib to trans-eurasian megaprojects

The questions of formation and development of railway lines as transport corridors of national and international (trans - Eurasian) level are considered on the example of the Altai region (in the 19th century, the Altai mountain district, now the Altai Krai and Republic Altai (Russia) and part of the East Kazakhstan oblast (Kazakhstan) located in the Altai mountain system). Attention is paid to Turksib as the first geopolitical transport corridor connecting Siberia through Kazakhstan with Central Asia. Modern TRANS-Eurasian megaprojects of transport corridors including the Altai region are presented.