Adverse driving conditions

For Adverse driving conditions, cfr citation is 49 CFR 395.1(b)(1); who qualifies is a driver who encounters adverse driving conditions; what it exempts from is may drive and be permitted or required to drive a commercial motor vehicle for not more than two additional hours beyond the maximum allowable hours permitted under § 395.3(a) or § 395.5(a); radius or condition is not more than two additional hours; baseline limit (for context) is § 395.3(a): 11 hours of driving inside a 14-hour window, after 10 consecutive hours off duty, recorded from its source on 2026-08-28; source re-checked 2026-08-30.

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

(1) Adverse driving conditions. Except as provided in paragraph (h)(3) of this section, a driver who encounters adverse driving conditions, as defined in § 395.2 , and cannot, because of those conditions, safely complete the run within the maximum driving time or duty time during which driving is permitted under § 395.3(a) or § 395.5(a) may drive and be permitted or required to drive a commercial motor vehicle for not more than two additional hours beyond the maximum allowable hours permitted under § 395.3(a) or § 395.5(a) to complete that run or to reach a place offering safety for the occupants of the commercial motor vehicle and security for the commercial motor vehicle and its cargo.

— ecfr.gov, retrieved 2026-08-28

Source

• ecfr.govhttps://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-395/subpart-A/section-395.1

Last verified against source: 2026-08-30. Due for re-check by 2027-08-28. This page as Markdown · OKF bundle · full dataset as JSON.