The effects of prompting and reinforcement on safe behavior of bicycle and motorcycle riders.

Okinaka et al. (2011) worked with college bike and motorcycle riders on a Japanese campus. The team wanted riders to dismount and walk their bikes on busy sidewalks.

They used a reversal A-B-A-B design. Guards gave vocal reminders and held up signs. When riders walked, guards added quick praise. The study ran across four time blocks.

Safe dismounting jumped each time the prompt-plus-praise package was in place. The behavior dropped when the package stopped, then rose again when it returned.

The pattern showed the guards' simple acts, not something else, caused the change.

Bigby et al. (2009) got a 20-point seat-belt boost with a single windshield flyer. Takeru adds live praise to the mix and still sees quick gains. Both tell us cheap signs plus a human voice work on campus streets.

Choi et al. (2018) pitted signs alone against feedback screens in restrooms. Feedback won. Takeru’s guards gave on-the-spot praise, a cousin to feedback, and it worked. The pair hints that signs alone may start the change, but a brief social consequence locks it in.

Van Houten et al. (2004) used a short police crackdown to double driver yielding for a full year. Takeru’s guards were softer—no tickets, just smiles—yet still saw fast change. The lesson: even mild social consequences can move traffic behavior if they are immediate.

You can copy this on any campus or school lot. Post a clear sign, then station a staff member to greet and praise every rider who walks. No money, no tokens—just a quick “Thanks for walking!” Rotate staff so the praise stays fresh. The reversal design gives you confidence: if behavior slips, re-start the praise and watch safety climb again.