I-579 speed limit in Pennsylvania

55 mphUsual limit

Mostly 55 mph: about 100% of I-579 in Pennsylvania is posted at 55.

How much of I-579 is at each limit

55 mph100%

Questions

What is the speed limit on I-579 in Pennsylvania?

Mostly 55 mph: about 100% of I-579 in Pennsylvania is posted at 55.

What is the highest speed limit on I-579 in Pennsylvania?

55 mph, on 100% of its length in Pennsylvania.

Can the limit be lower than this?

Yes. Work zones, bad weather and local signs can set a lower limit. The posted sign is always the limit.

How does Orbit know the limit?

Orbit uses state and federal road data and OpenStreetMap, and drivers confirm limits from the road. In the app, the limit for the road you are on shows on the map and in CarPlay.

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.

Other Interstates in Pennsylvania

I-70 I-76 I-78 I-79 I-80 I-81 I-83 I-84 I-86 I-90 I-95 I-99 I-176 I-180 I-276 I-279 I-283 I-295 I-376 I-380 I-476 I-495 I-676

Orbit shows the limit for the road you're on · coming soon to iPhone and CarPlaySee Orbit SI