Complex sentence: The 2-lane highway opened up in the mid- 1980s to the south side until the late 1980s, the bypass began in the south until the opening between the 9th and the 13th km of GR-9 and E55 was rerouted.
Split into simpler sentences: The 2-lane highway opened up in the mid- 1980s on the south side until the late 1980s. The bypass began in the south until the opening between the 9th and the 13th km of GR-9 and E55 was rerouted.