Read the story, then do the math together!

The Secret to Our Streets

The Secret to Our Streets

Did you know highways all follow a code? I-90 from Seattle to Boston, I-80 from northern California to New Jersey - these east-west highways get even numbers, and north-south highways get odds. Small east-west numbers start way south, ending with I-90 up north. Small north-south numbers start out west with I-5 through Washington, Oregon and California, while I-95 runs down the East Coast. With over 46,000 miles of road, we need a good way to keep track.

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