As school choice options grow, it is helpful to test for indirect effects on non-choosers who are left behind in district-run schools. Can a competitive system built on the principle of choice serve as a rising tide that lifts all boats or will such systems further existing inequities? The largest competitive effects analysis of a voucher program in the United States, this study helps address existing gaps in knowledge by examining how the Indiana Choice Scholarship Program affects students in traditional public schools, looking at the change in academic outcomes and graduation rates of students in Indiana traditional public schools based on their proximity to private schools participating in this statewide K-12 private school voucher program. We use network proximity data to generate a "drive-time" measure that accounts for road lengths, intersection turn times, speed limits, and traffic data and allows us to calculate precise travel time between two points--down to the minute. We use this precise measure in a difference-in-differences framework to examine impacts on student math and English Language Arts test scores and graduation rates. We find little evidence that the average student in traditional public schools has been affected--either positively or negatively--by the enactment and growth of the Indiana Choice Scholarship Program. We do find, however, consistent evidence of small positive effects for low-income children.