E. LearndmvDMV PRACTICE
Find your state Exam types Practice tests Sign in Create account ↗
Practice quizzes / DC CDL General Knowledge Practice Questions - District of Columbia Commercial Driver License General Knowledge Test Exam / Question 77466
Practice question

How far ahead is 12 to 15 seconds at highway speeds, roughly?

  1. About a quarter mile
  2. About one vehicle length
  3. About 20 feet
  4. About the length of the hood

Answer: A — About a quarter mile

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: DC CDL General Knowledge Practice Questions - District of Columbia Commercial Driver License General Knowledge Test Exam →
Learndmv.

Thoughtful practice for the road ahead. Find permit, road signs and CDL preparation by state.

Explore

Practice by stateAll practice testsExam types

Your account

My profilePractice historyAccount security

Get started

Create accountSign inSitemap
© 2026 LearndmvIndependent practice resource · Not affiliated with any state DMV.