# Study: Consumers Show No Impairment in Their Next-Day Driving Performance Despite Residual THC Blood Levels

> **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637)
> **Publisher:** CED Clinic (https://cedclinic.com)
> **Canonical URL:** https://cedclinic.com/study-consumers-show-no-impairment-in-their-next-day-driving-performance-despite-residual-thc-blood-levels/
> **Published:** 2026-03-20T00:26:44-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T11:04:43-04:00
> **Clinical Summary:** Your morning commute might be biochemically more complicated than you think, but the data suggests your insurance company can relax. Residual THC in your bloodstream apparently doesn’t translate to the fumbling steering wheel performance we might expect. Via r/trees Further Reading Research DigestResearch Digest: 20 Recent Studies – March 19, 2026 Cannabis Policy WireNeuroprotective Potential […]

---

Your morning commute might be biochemically more complicated than you think, but the data suggests your insurance company can relax. Residual THC in your bloodstream apparently doesn’t translate to the fumbling steering wheel performance we might expect.

Via [r/trees](https://reddit.com/r/trees/comments/1rxr2gs/study_consumers_show_no_impairment_in_their/)

Further Reading
Research Digest[Research Digest: 20 Recent Studies – March 19, 2026](https://cedclinic.com/research-digest-recent-studies-march-2026/)
Cannabis Policy Wire[Neuroprotective Potential of Cannabidiol (CBD) in Preventing Oxaliplatin (Ox)-Induced Neuropathy](https://cedclinic.com/cannabidiol-neuroprotective-potential-oxaliplatin-neuropathy/)
Evidence Watch`Cannabinoid Clinical Trials: CBD and Cortical Excitability`

 

### Related

---

### Verification & Medical Governance

- **Lead Clinical Author:** Benjamin Caplan, MD
- **Credentials:** Board Certified in Family Medicine (ABFM), Former CMO Canna Care Docs (250,000+ patients supervised), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House).
- **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`).
- **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/).
- **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637).
- **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).