It starts in the south on the border with Baja California, and ends in the north on the border with British Columbia.

There are two systems of highways that crisscross the United States: the US Highways (a.k.a. US Routes) with white shields, est. 1926; and the Interstates with blue shields, which are all freeways, est. 1956.

In both systems, east-west routes have even numbers and north-south routes have odd numbers. For US Highways, even route numbers increase from north to south, and odd numbers from east to west. For Interstates, the order is reversed.

As a consequence of the two numbering grids, if you mark the places where two highways meet, and one is even and the other odd, and their numbers are in the same decade, two patterns emerge. If the two highways are of the same system, the points fall along a rough path from southwest to northeast, and if they are one of each, the points fall from northwest to southeast.

(excluding Trans-Canada Highways)

If you're driving on highway 401 (or any highway really) after the blizzard. PLEASE, please, PLEASE CLEAN THE SNOW OFF YOUR VEHICLE.

https://www.youtube.com/watch?v=WhR1DJ4uL7E

In this video you can see the whole Trip from Zadar to Zagreb, Croatia on the Highway through the Mountain ''Velebit''.

You will also see multiple tunnels like Sveti Rok and Mala Kapela.

I was driving in the early Morning so you will see the Sunrise aswell...

The most intriguing thing in the video was the Temperature before and after the Tunnel ''Sveti Rok''. Before the Tunnel the Temperature was 27°C and after the Tunnel it was only 10°C, cuz it was on the other side of the Mountain.