Public Transportation Systems Vulnerability Assessment and Reduction Act of 2003

Public Transportation Systems Vulnerability Assessment and Reduction Act of 2003 - Directs the Secretary of Homeland Security (Secretary) to: (1) review all government assessments conducted after September 11, 2001, of terrorist-related threats to all forms of public transportation, including related public gathering areas; (2) conduct, as necessary, additional assessments of vulnerabilities associated with any public transportation system; and (3) determine the percentage of frontline transit employees who have received training in emergency preparedness and response activities.

Authorizes the Secretary to make grants to eligible transportation agencies for the training of frontline transit employees in emergency preparedness and response activities and the acquisition of approved equipment and technologies to assist in carrying out such training and activities. Allocates grant amounts among eligible transportation agencies based on their needs for emergency preparedness and response training and equipment, requiring not less than ten percent of such amounts to eligible transportation agencies in non-urban areas.