What are those strange markings in my lane?

Q. Hi Honk: I recently saw some unusual road markings on a transition linking the the 133 and the 405 freeways. They are about a foot long each and, horizonally, extend from the solid white lines on each side of the lane. At the beginning they are spaced about six to eight eight feet apart and gradually get closer to one another, to about three to four feet apart. What are these lines for? I’ve only ever seen them at this one location.
– Dan Savage, Lake Forest
A. Think Houdini, Dan,