A Park Police officer riding a motorcycle was reportedly involved in a collision on the eastbound side of the Southwest Freeway this morning. The officer was helicoptered away from the scene of the incident, located near 7th Street SW — ARLnow reports that police shut down the northbound lanes of the 14th Street Bridge in order to create for an impromptu Medivac landing space. (UPDATE: The 14th Street Bridge has reopened.) Traffic is understandably stalled…