www.securitymagazine.com/articles/77148-buildings-for-rail-mass-transit-1
Buildings For Rail, Mass Transit
June 1, 2004

Porta-King Building Systems’ pre-assembled Police Koban features include Class III bullet-resistant construction to protect officers, custom-designed stainless steel monitor-shelves and cabinets for surveillance equipment, exterior-mounted autodial “911” phones to report emergencies, climate control, service sink and dimming lights to reduce glare and increase visibility during night hours