To find this information, you'd likely need to:
* Check ASU's Institutional Research: ASU's Office of Institutional Research and Effectiveness probably has data on student demographics, including commuting patterns. You'd need to contact them directly or search their published reports.
* Review ASU's Transportation Services Data: The department responsible for transportation on campus might have data on parking permits or usage of public transportation, which could offer an indirect estimate of commuting students.
In short, there's no simple answer to this question. You'll need to do some research using the resources mentioned above.