Orbit Washington Interstate speed limits
The posted limits on every Interstate in Washington, measured along each road: the limit you'll see most, and the range from the slowest stretch to the fastest. The highest Interstate limit in Washington is 70 mph.
| Interstate | Usually | Range |
|---|---|---|
| I-5 | 60 mph | 60 to 70 mph |
| I-82 | 70 mph | 60 to 70 mph |
| I-90 | 70 mph | 60 to 70 mph |
| I-182 | 70 mph | 60 to 70 mph |
| I-205 | 60 mph | 55 to 60 mph |
| I-405 | 60 mph | 60 mph |
| I-705 | 60 mph | 60 mph |
Posted limits as of October 2026, from state and federal road data and © OpenStreetMap contributors, measured by length of road. Work zones, weather and signs can set a lower limit; always follow the posted sign.
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