In response to YorksDevil's comment, I have spent hours and hours designing an elaborate poster for Train Companies to use up and down the country. I really do think this will get the message across. This poster shows enormous originality and will make people understand the issue like never before witnessed in this public-transport travelling era.
If you have a better idea, please e-mail your poster to me at ... and I shall post them up here. Truly inspirational.