📅 Last reviewed: July 2026 · MySleepTool Editorial Team
Truck Driver Sleep Compliance Calculator
Plan your HOS-compliant driving windows, mandatory rest periods, and sleep strategy based on FMCSA Hours of Service regulations. Stay legal and stay safe.
📋 Your HOS compliance plan
FMCSA Hours of Service — Key Rules (2026)
Property carriers (standard CMV operators): 11-hour driving limit in a 14-hour on-duty window, following 10 consecutive hours off duty. 30-minute rest break required after 8 cumulative hours of driving. 60/70-hour limit in 7/8 consecutive days (depends on carrier schedule). 34-hour restart option to reset the weekly clock (must include two 1–5 AM periods).
Sleeper berth provision: Drivers with a sleeper berth may split the required 10-hour off-duty period into two periods — as long as one is at least 7 consecutive hours in the sleeper berth and the other is at least 2 consecutive hours (in the berth or off-duty). Neither period counts against the 14-hour window.
The Fatigue Science Behind HOS Rules
FMCSA HOS rules are grounded in sleep science research on drowsy driving — a leading cause of large truck crashes. Research from NHTSA indicates drowsiness is a factor in approximately 40% of heavy truck crashes. The 14-hour window rule specifically addresses cumulative fatigue regardless of driving hours — because even if a driver hasn't driven much, being on duty for 14+ hours impairs judgment through time-awake effects independent of driving load.
What is the 30-minute rest break rule?
Property carrier drivers must take a 30-minute off-duty or sleeper berth break after 8 cumulative hours of driving. The break must be 30 consecutive minutes — it cannot be split. This rule was reinstated to specifically address the fatigue accumulation research showing significant impairment after 8 hours of driving even within the 11-hour limit. The break must occur before the 8-hour driving mark, not after.
How does the 34-hour restart work?
The 34-hour restart allows drivers to reset their 60/70-hour weekly limit. To qualify, the off-duty period must be at least 34 consecutive hours and include two periods from 1–5 AM (home terminal time). After the restart, the driver's 60/70-hour clock resets to zero. Note: the restart can only be used once every 168 hours (7 days) — you can't take two restarts in the same week to exceed the weekly driving limit.
📋 ⚠️ Legal disclaimer: This tool provides general educational information about FMCSA HOS regulations. Always verify current rules at fmcsa.dot.gov — regulations can change. Your ELD (Electronic Logging Device) is the authoritative record of HOS compliance. Reviewed July 2026.