The very first spaghetti junction; the borders where you must switch which side of the road you drive on; the countries that switched which side of the road everyone drove on; and the arterial road that crosses an airport runway.
Original – Highways Agency photo on flickr [CC BY 2.0], via Wikimedia Commons
Combine three motorways, two railway lines, three canals, two rivers and you get the first junction described as spaghetti.
Cars in some countries drive on the left; cars in other countries drive on the right. At the borders between them, road design has to get creative.
Jan Collsiöö / Public domain
Cars in some countries drive on the left; cars in other countries drive on the right. And sometimes countries decide to switch from one to the other.
Michael F. Mehnert [CC BY-SA 3.0], via Wikimedia Commons
The main road into and out of Gibraltar crosses an airport runway.
The Generalist Academy 
