Complex sentence: The M37 highway is the most important highway in Turkmenistan and is the Turkmenistan section of the European route E60 which connects Brest, France to Irkeshtam, Kyrgyzstan on the border with People's Republic of China.
Split into simpler sentences: The M37 highway is the most important highway in Turkmenistan. It is the Turkmenistan section of the European route E60 which connects Brest, France to Irkeshtam, Kyrgyzstan on the border with People's Republic of China.