part_subject: "CONTROL OF EMISSIONS FROM NEW HEAVY-DUTY MOTOR VEHICLES"
subpart_code: "F"
subpart_subject: "Test and Modeling Procedures"
section_number: "1037.527"
section_subject: "Aerodynamic measurements for vocational vehicles."
cfr_reference: "40 CFR 1037.527"
title_name: "Title 40"
title_subject: "Protection of Environment"
parts_covered: "Parts 1000 to 1059"
revised_date: "Revised as of July 1, 2017"
publication_date: "As of July 1, 2017"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
This section describes a methodology for determining aerodynamic drag area, C
d
A, for use in determining input values for vocational vehicles as described in § 1037.520. This measurement is optional.
A values by performing A to B testing as described for trailers in § 1037.526, with any appropriate adjustments, consistent with good engineering judgment.