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Ventura Property Management Blog

U.S. Freeway Facts

Jean Pericone - Friday, June 26, 2020

How freeways are numbered:

  • Routes with odd numbers run north-south.
  • Routes with even numbers run east-west.
  • For north-south routes, the lowest numbers are in the west.
  • For east-west routes, the lowest numbers are in the south.

So, I-5 runs north-south along the west coast, while I-10 runs east-west in the south.

The major transcontinental routes are:

East-west Transcontinental Routes
Interstate #FromToDistance
I-10Los Angeles, CAJacksonville, FL2,459.96 mi
(3,959 km)
I-80San Francisco, CATeaneck, NJ2,906.77 mi
(4,678 km)
I-90Seattle, WABoston, MA3,085.27 mi
(4,965 km)


North-south Transcontinental Routes
Interstate #FromToDistance
I-5San Diego, CABlaine, WA1,382.04 mi
(2,224 km)
I-15San Diego, CASweetgrass, MT1,436.89 mi
(2,312 km)
I-35Laredo, TXDuluth, MN1,831.43 mi
(2,947 km)
I-55New Orleans, LAChicago, IL943.69 mi
(1519 km)
I-65Mobile, ALGary, IN888.08 mi
(1,429 km)
I-75Miami, FLSault Ste Marie, MI1,787.49 mi
(2,877 km)
I-95Miami, FLHoulton, ME1,892.76 mi
(3,046 km)
Cool Facts About the Interstate System
  • Total Distance - 42,794 mi (68,870 km)
  • Longest Route - I-90; Seattle, WA, to Boston, MA; 3,085.27 mi (4,965km)
  • Shortest Route - I-97; Annapolis, MD, to Baltimore, MD; 17.57 mi (28.27 km)
  • Longest East-west Route - I-90; Seattle to Boston; 3,085.27 mi (4,965 km)
  • Longest North-south Route - I-95; Miami, FL, to Houlton, ME; 1892.76 mi (3,046 km)

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