Complex sentence: Later, the A43 bypasses Towcester, where it meets the A5 (Roman Watling Street) at a roundabout created when the road was built from Towcester in 1991.
Split into simpler sentences: Later, the A43 bypasses Towcester, where it meets the A5 (Roman Watling Street) at a roundabout. The junction was created when the road was built from Towcester in 1991.