Complex sentence: Prior to 2010, only one directional sign had been posted on the highway-on the eastbound side after the on-ramp from US 7-but sign replacements and additions in late 2010 added directional signs on both the eastbound and westbound sides of the route.
Split into simpler sentences: Prior to 2010, only one directional sign had been posted on the highway-on the eastbound side after the on-ramp from US 7. Sign replacements and additions in late 2010 added directional signs on both the eastbound and westbound sides of the route.