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Reading the regulations as they stood on December 31, 2016. Current text may differ.Switch to current
Current textIn force on Dec. 31, 2016Source: annual CFR editions 2011–2016

§ 383.115 Requirements for double/triple trailers endorsement.

Current wording, in the annual edition revised as of Oct. 1, 2011.

govinfo, 2016 edition ↗
Before Jan. 1, 2017 the record is one snapshot per annual CFR edition, revised as of October 1. This is the 2016 edition's wording. An amendment that took effect between Oct. 1, 2016 and Dec. 31, 2016 would not appear until the next edition, so check the citations below and the Federal Register for exact effective dates.
49 CFR § 383.115 — Requirements for double/triple trailers endorsement.. Text in force on December 31, 2016. This wording effective October 1, 2011 to present. Source: govinfo, 2016 edition, https://www.govinfo.gov/app/details/CFR-2016-title49-vol5/CFR-2016-title49-vol5-sec383-115. Retrieved from FMCSR.com, https://fmcsr.com/reg/383.115?asof=2016-12-31, on October 26, 2026. Unofficial compilation; verify against the official source.

In order to obtain a double/triple trailers endorsement each applicant must have knowledge covering:

(a) Procedures for assembly and hookup of the units;

(b) Proper placement of heaviest trailer;

(c) Handling and stability characteristics including off-tracking, response to steering, sensory feedback, braking, oscillatory sway, rollover in steady turns, and yaw stability in steady turns;

(d) Potential problems in traffic operations, including problems the motor vehicle creates for other motorists due to slower speeds on steep grades, longer passing times, possibility for blocking entry of other motor vehicles on freeways, splash and spray impacts, aerodynamic buffeting, view blockages, and lateral placement; and

(e) Operating practices and procedures not otherwise specified.

[76 FR 26890, May 9, 2011]

Amendment history

2 distinct wordings on file since Oct. 1, 1996
  1. Oct. 1, 2011 → presentannual editions 2011–2016diff vs. previousviewing
    [76 FR 26890, May 9, 2011]
  2. Oct. 1, 1996 → Oct. 1, 2011annual editions 1996–2010

A new entry appears whenever the regulatory words change between government snapshots. Day-precise from the eCFR (2017 onward); before that, one snapshot per annual CFR edition (revised as of October 1). Bracketed citations are the Federal Register history printed with the section.