This report presents an analysis of the effects of highway bypasses on the business activities of a sample of small Texas cities. An initial explanatory analysis (using a before-and-after method, matched pairs, and projected development) did not reveal a significant relationship between highway bypass construction and a change in business volumes. It can be concluded that business volumes in the more rapidly growing cities with imperfect infrastructure and relatively high local traffic benefit from highway bypass construction. On the other hand, initial econometric modeling demonstrated that a highway bypass can have a statistically significant negative effect on business volumes in the small Texas cities that were studied. The results of the econometric modeling show that the way in which a business community responds to a highway bypass is complex. The major factor determining business volumes is the city's population.