The transportation could be arranged at more convenient routes. Reward for attending. Call their parents. Exemptions on finals and semester exams by having three or less absences would make students want to not miss school. The tardy and absence policy is already too harsh and I think it needs to be lightened up a bit.
School needs to be more enjoyable.
Allow final exemptions if attendance and grades are good. Give them an incentive. The exemption program would definitely improve attendance. Make classes more interesting and not boring. Calling their parents when they are ditching or have excessive absences to see if there is good reason for it.