I Interstate Learning

Learn the interstate system

Spaced-repetition quizzes over the numbering rules, hub junctions, and route building.

Today's review

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Chicago Atlanta Dallas Denver Nashville Kansas City St. Louis Indianapolis Memphis Salt Lake City Albuquerque Cleveland Knoxville Birmingham Oklahoma City Seattle Portland San Francisco Los Angeles San Diego Phoenix Houston New Orleans Miami Jacksonville Boston New York Washington Detroit Minneapolis Omaha Charlotte 10 10 20 20 40 40 70 70 80 80 90 90 24 24 44 44 94 94 30 30 5 5 15 15 25 25 35 35 55 55 65 65 75 75 81 81 95 95 85 85 45 45 Even (EW): I-10 south → I-90 north Odd (NS): I-5 west → I-95 east

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East-west trunks (even, south → north):

North-south trunks (odd, west → east):

1. Numbering rules

Even = east-west, odd = north-south. Low = south/west, high = north/east.

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2. Hub cities

Atlanta is I-20/75/85. Dallas is I-35/20/30/45. Know the junctions, routing falls out.

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3. Build a route

Given two cities, type the interstate sequence. The map animates each segment.

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