In a situation like this, having an effective transit system is good for both parties. Commuter rail (and to a lesser extent, commuter buses) in the US run in an out-dated manner; from the suburbs, to the CBD. This means that land prices and building sizes in the CBD go way up, and mid-sized and small businesses look elsewhere to lease. However, in Europe commuter rail is typically through-run through city centers with full-day operation (see Germany's S-bahns and Paris' RER for example). This allows businesses to locate along transit elsewhere than the CBD, which spreads out development (especially helps in Europe, where many cities have height restrictions in their down-town, and can't build massive complexes) while still providing excellent access for commuters without cars.