It discourages people to use bicycles as a form of transportation and contribute to urban congestion. Also it inconveniences many commuters who do commute on their bikes. Not all workplaces are within walking distance of Metro stops. Finally, the citation that bicycles are a safety hazard during rush hour is flawed. If bikes were a safety hazard, why do we allow them on the Metro in the first place? I have seen people get on the Metro with bikes during rush hour because of the inconsistent application of this rule. People are smart enough to avoid tripping on a bike.