30 C.F.R. § 57.11051
Escape routes
Escape routes shall be—
(a) Inspected at regular intervals and maintained in safe, travelable condition; and
(b) Marked with conspicuous and easily read direction signs that clearly indicate the ways of escape.
Escape routes shall be—
(a) Inspected at regular intervals and maintained in safe, travelable condition; and
(b) Marked with conspicuous and easily read direction signs that clearly indicate the ways of escape.