Drive-time trade areas vs. radius rings: which is better?
Drive-time trade areas are generally more decision-useful because they follow the road network and actual travel constraints. A 3-mile radius treats every direction as equally reachable, even when highways, rivers, limited crossings, one-way systems or congestion make access asymmetric. Radius rings can still provide a quick reference, but SiteThesis treats network-based drive time as the primary suburban geography and uses radius rings as a comparison layer rather than the demand boundary.