Cold spell means cars can cross 20km stretch of frozen sea but drivers must be able to exit quickly in case of a problem Cold spell means cars can cross 20km stretch of frozen sea but drivers must be able to exit quickly in case of a problem Temperatures in northern Europe have been so low that citizens of Estonia can now drive across a 20km stretch of frozen sea linking the country’s two main islands. The so-called “ice road” connecting the islands of Saaremaa and Hiiumaa, located in western