My idea for smarter driving is to use a fashionable craze in pop, hip-hop and general urban culture lately. Take t-shirts and either spray paint or iron on letters for the slogans "Smarter driving skills pay less insurance bills!" or "Think before you push the gas or pay some money out the wazoo!" These will encourage students to practice safer driving skills, while also allowing them to be fashionable and show off the artistic talents of the shirts creator.
Examples of spray painted shirts can be found here:
Examples of iron on letters for shirts can be found here: