Complex sentence: In 1995-1997 the road was widened from the initial four to ten lanes, while all intersections became grade-separated, bridges were built to accomodate pedestrians, traffic lights were removed, and a solid concrete barrier was installed in the median.
Split into simpler sentences: In 1995-1997 the road was widened from the initial four to ten lanes. All intersections became grade-separated, bridges were built to accomodate pedestrians, traffic lights were removed, and a solid concrete barrier was installed in the median.