Marine Traffic

Maps showing the number of ships stuck because of the Suez Canal blockage are very eye opening.

via Reuters

The amount of global commerce that can be disrupted by one ship is astonishing.  Marine Tracker is a live map that shows just how much shipping traffic there is worldwide. Here is the ship traffic in western Europe.

You get a good idea from the map where other bottlenecks might occur such as the Straits of Hormuz,

and Malacca.

A click on the map brings up info about individual ships such as this one waiting to get through the Suez Canal. The ship is called the "Mexico City" but is sailing under the flag of Singapore from Colombo, Sri Lanka.

I also like how it shows inland traffic. You can see much of Illinois outlined from this screen shot.