Texas DMV Written Driving Practice Test

When entering the highway, drivers should have at least 15 seconds to merge with traffic. This allows for enough time to adjust speed and find an appropriate gap in traffic. Options A, C, and D are not sufficient as 10 seconds may not provide enough time to safely merge, 5 seconds is too short of a time frame, and 20 seconds may be too much time and cause traffic backup on the on-ramp. It is important for drivers to properly gauge the amount of time they have to merge and be aware of their surroundings to safely merge onto the highway.