National-security dossier
Freight, emergency response and national-security implications
Commercial freight capacity, Department of Defense surface movements, emergency equipment, derates and aftertreatment reliability on civilian-registered heavy diesel.
The Department of Defense's tactical wheeled vehicles are largely exempt from EPA on-highway emissions requirements. The civilian Class 8 tractor that hauls a MRAP, a HIMARS launcher or a containerized field hospital from the arsenal to the port is not.
This dossier will examine:
- Commercial freight capacity dependent on emissions-compliant tractors
- Emergency response equipment subject to derate behavior
- DEF supply chain and cold-weather failure modes
- Aftertreatment component reliability and mean time between failures
- Interaction between EPA derate rules and DOD surface movements
Factual status: Awaiting documentation Additional sourcing and citations will appear here as they are archived.
Military and emergency exemptions on the record
Federal regulation acknowledges mission-critical mismatch through conditional exemptions for tactical military vehicles (40 CFR 1068.225) and national-security fuel use (40 CFR 1090.605). These exemptions are conditional, not universal — civilian freight and passenger transport have no equivalent pathway.
- 40 CFR 1068.225 — Exemptions for tactical military vehicles and equipment
Regulation · Neutral background
- 40 CFR 1090.605 — Fuel exemption for national security purposes
Regulation · Neutral background
- 40 CFR 1036.111 — Diagnostic and inducement requirements
Regulation · Neutral background
- Proposed amendments to heavy-duty highway and nonroad diesel provisions (Docket EPA-HQ-OAR-2026-0728)
EPA rulemaking · 2026 · Supports repeal or revision
- SBA Office of Advocacy — analysis of savings from removal of the diesel exhaust fluid (DEF) sensor requirement
SBA analysis · 2025 · Supports repeal or revision
- An Analysis of the Operational Costs of Trucking (annual report)
Industry data · annual · Supports repeal or revision
Related reporting
FreightWaves · Rob Carpenter · July 10, 2026
EPA's War on Diesel Is a National Security Issue
Tactical vehicles have an exemption pathway; the civilian tractors that move them to the port do not.