Modular Security Systems Inc. (MSSI) has been installing full height, high security turnstiles into ISO shipping containers since 2002. Turnstiles like those used in the Patented Modular Access Control (MAC) Portal have been used in a wide variety of places, including stadiums, amusement parks, museums, mass transit stations, major sporting events, outdoor festivals, casinos, and cafeterias. Before the invention of the Patented Modular Access Control (MAC) Portal the idea of using turnstiles as a temporary means to manage the access of foot traffic onto major industrial construction projects had not been introduced. Using what was known by many as "Brass Alleys" employees were administered coins with unique employee numbers for each employee. Every morning before the beginning of the shift the employee would pass through the Brass Alley turning in his/her coin to essentially "clock in" for the day.
Given modern advancements in technology and equipment access control and time keeping has become a bit less rudimentary in comparison to earlier methods.
Utilizing biometric access control technologies like hand geometry readers, Iris eye scanning detection, and access card readers MSSI has been able to provide customers with full height turnstiles that both secure their location as well as provide time-keeping capabilities for payroll purposes.