40 CFR § 1066.290 - Verification of speed accuracy for the driver's aid.

---
identifier: "/us/cfr/t40/s1066.290"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1066.290 - Verification of speed accuracy for the driver's aid."
title_number: 40
title_name: "Protection of Environment"
section_number: "1066.290"
section_name: "Verification of speed accuracy for the driver's aid."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1066"
part_name: "VEHICLE-TESTING PROCEDURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
regulatory_source: "79 FR 23823, Apr. 28, 2014, unless otherwise noted."
cfr_part: "1066"
---


# 1066.290 Verification of speed accuracy for the driver's aid.

Use good engineering judgment to provide a driver's aid that facilitates compliance with the requirements of § 1066.425. Verify the speed accuracy of the driver's aid as described in § 1066.235.