Participants will be randomly assigned to one of eight study groups which will be one or a combination of 4 conditions: (1) in person individualized diet and exercise counseling (2) diet and exercise text messages (3) weekly telephone support and (4) self-monitoring tools for diet and weight. For the first part of the study, Survey, approximately 64 drivers and 36 management staff will take pate in the feedback questionnaire. For the second part of the study, Interview, approximately 8 drivers and 12 management staff may be invited to take part in an interview via phone, in person, or teleconference (Zoom).
In-person individual diet and physical activity (PA) counseling
Behavioral: Text Messages
Thrice-weekly diet/physical activity(PA) text messages
Behavioral: Phone calls
Weekly telephone support
Behavioral: Self-monitoring tools
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