The Department of Homeland Security Transit Security Grant Program (TSGP) focuses on the use of visible, unpredictable deterrents to reduce risk to transit systems. Transit Security Grants fund capital projects including Multi-User High-Density Key Infrastructure Protection, Single-User High-Density Key Infrastructure Protection, Key Operating Asset Protection, and other mitigation activities. These construction grants pay for infrastructure improvements such as installation of anti-terrorist barriers at tunnel entrances and security systems for underground and underwater infrastructure. In addition, Transit Security Grants also fund canine, mobile explosives detection screening, and anti-terrorism teams. FEMA allocated $72.2 million to four transit security capital projects and $77.8 million to 15 transit security terrorist teams.