This isn't a Tesla issue. Many cars are getting line following driver assistance. Basically cruise control plus. Many cars soon will become all cars. Currently lines are not well maintained, use paint that fades quick, and have varying standards across towns and states. There needs to be a nationwide standard for line painting that has the same standards for what is what, uses paint that lasts longer, with rules about how they are maintained. Its sort of obvious that "line following driver assistance" will soon become adopted on a mass market level, and that plans for having the best lines to support them need to get started.