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Recently public agencies have been promulgating idling bans in an effort to mitigate the environmental effects of heavy-duty truck idling. In order to make rational choices, regulators, manufacturers, and consumers will need to compare idling reduction strategies, such as truck stop electrification and auxiliary power units. Truck driver behaviors, such as idling time, idling location, and accessory use will significantly influence the cost-effectiveness of the various technology options. Truck driver attitudes toward idling and idling alternatives will influence adoption of the technologies. A pilot survey of 233 line-haul truck drivers was administered in Northern California as the first step in assessing truck driver behaviors and attitudes related to idling. Initial findings reveal that line-haul truck drivers idle primarily to power climate control.