Before we expound, let’s let Mike explain himself. “When merging into another lane, sometimes I find myself crossing the white line on the freeway,” he wrote to us here at Traffic Q&A headquarters.

Question: I enjoy reading your column. I have been driving for a number of years but still get confused as to what all the white road markings mean. I know what the white dashes on a road/highway mean ...

Question: I enjoy reading your column. I have been driving for a number of years but still get confused as to what all the white road markings mean. I know what the white dashes on a road/highway mean ...

Question: I enjoy reading your column. I have been driving for a number of years but still get confused as to what all the white road markings mean. I know what the white dashes on a road/highway mean ...

Starting Sept. 1, drivers who weave across the solid white lines and break express lane rules on certain highways will receive a warning. This is just the beginning of the crackdown. A fire sparked in ...

Q A friend of mine was entering the freeway and crossed over the white line to pass a slow-moving truck that was ahead of him. He was pulled over and given a warning for crossing over the white line.