What is the speed limit in Death Valley?

Death Valley dirt roads have a speed limit of 25mph unless otherwise posted. Speeding creates that oh-so-enjoyable washboard everyone loves, and with over 1,000 miles of roads in the park, it may be awhile before your favorite route is graded.

Why the speed limit is different?

There are reported accidents in Death Valley because of its slope that is why speed limit should be slowed down.