Preparation tools that move with you

Study with direction. Verify with official sources.

Use DIESEL XTREM resources to organize preparation, then confirm current requirements with your licensing agency and FMCSA.

Student tools

Start with the resource that matches your next step.

Readiness Checklist

Track the permit, medical, ELDT, appointment and vehicle items you need to confirm before test day.

CDL Knowledge Center

Read practical articles about preparation, retests, test trucks and test-day planning.

Browse Articles

CDL 10-Step Road Map

Choose your situation and follow the recommended steps from your current status to your CDL goal.

View the Road Map

TWIC Card Career Guide

Learn why secure maritime access can matter for port, container and intermodal trucking opportunities.

Read the TWIC Guide

Official information

Go to the source when requirements matter.

FMCSA CDL Process

Federal CDL requirements and process information.

FMCSA CDL Resources

Federal CDL standards and guidance.

Commercial Driver Resources

Official information for commercial drivers.

Verify DIESEL XTREM on the FMCSA Registry

View the official registry and confirm DIESEL XTREM's current provider listing.

Official TWIC Enrollment

Review current TSA requirements, documents, fees and enrollment steps.

Medical requirements

DOT Medical Physicals

CDL drivers may be required to pass a DOT physical with a qualified medical examiner listed on the FMCSA National Registry. Your Medical Examiner's Certificate must be kept current throughout your CDL career.

DOT physical overview

What a DOT physical is, why CDL drivers may need one, and what the examiner checks.

Find a DOT physical near me

Use our location finder to search for qualified DOT medical examiners by ZIP code, city, or current location.

Medical card information

Your Medical Examiner's Certificate is valid for up to 24 months. Learn how to keep it current and upload it to your student portal.

FMCSA examiner verification

Verify that your examiner is listed on the FMCSA National Registry before your appointment.

DOT Medical Physical Guide

Installable app

Keep the public resources one tap away.

Install DIESEL XTREM from your phone browser for fast access. Protected student access still requires verification.