From what I've seen in Holland, it's simple etiquette there that an office commuter is expected to keep his speed low enough to avoid breaking a sweat. And sinc

From what I've seen in Holland, it's simple etiquette there that an office commuter is expected to keep his speed low enough to avoid breaking a sweat. And since the prevailing speed in the bike lanes is set by middle aged office workers, everyone winds up adhering to the rule. Even here in Boston, I'd expect the same norm to work, though right now the prevailing norm in the bike lanes is set by speed demons like myself.