Hold a pizza party or potluck lunch to celebrate a crash-free quarter or month. Feature the event in your company newsletter. Collaborate with a local college or high school to offer defensive driving courses to young employees. Consider each objective carefully when deciding what evaluation method to use. If you are having trouble devising a way to evaluate a certain objective, maybe the objective itself is too vaguely written.
Employees understand the concept of the designated driver.
Evaluation should be ongoing. Get the information out to management and the workforce alike to justify the program and reinforce learning. But if evaluation shows that you are not yet achieving success, don't be discouraged. You've just obtained valuable information that can help you refocus your efforts in more productive ways.