Pull MUTCD Part 3 marking dimensions and color conventions to use as a voluntary design reference when a private lot owner wants 'DOT-standard' striping even though the lot isn't legally required to follow MUTCD.

domain: FHWA MUTCD 11th Edition, Part 3 (Markings), Section 3A.04 · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗

Steps

  1. Fetch the mutcd.fhwa.dot.gov Part 3 PDF (freely public).
  2. Extract Section 3A.04's current line-width definitions: a 'normal' line is 4 to 6 inches wide, and a 'wide' line is at least twice the width of the normal line used (not a fixed 6-or-8-inch category) — plus color assignments (white for same-direction/right-edge lines, yellow for opposite-direction/left-edge lines).
  3. Extract standard pavement marking word/symbol dimensions for reference where relevant (e.g., stop bars, arrows).
  4. Adapt the extracted conventions for the private lot's fire lanes, no-parking zones, and directional arrows.
  5. Document in the proposal that these are used as a voluntary design reference, not a legal MUTCD-compliance claim.

Known gotchas

Related routes

Confirm a state DOT's own traffic-paint specification (application rate, dry-to-no-pickup time, bead embedment rate) before assuming the federal TT-P-1952 baseline alone governs a state-funded striping job.
State DOT Standard Specifications for Road/Bridge Construction, pavement-marking section (varies by state; commonly builds on Federal Spec TT-P-1952) · 5 steps · unrated
Determine whether a specific private shopping-center or corporate-campus lot restripe falls under MUTCD 11th Edition jurisdiction or is exempt as private property.
FHWA Manual on Uniform Traffic Control Devices (MUTCD), 11th Edition · 5 steps · unrated
Calculate the minimum number of ADA-compliant accessible parking spaces (including van-accessible spaces) required when restriping a private lot with a known total space count.
ADA.gov — 2010 ADA Standards for Accessible Design, Section 208 (via ADA Compliance Brief: Restriping Parking Spaces) · 5 steps · unrated

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