MDI® knows how important safety, protection, 
and visibility are to work zone crews and 
emergency responders. With this in mind, 
we are proud to offer our customers a wide 
selection of high-quality, state-of-the-art 
traffic control products that safeguard lives 
and property.
TRAFFIC FLOWS THROUGH US
Known in the industry as a true innovator, 
MDI invented WindMaster®, the first  
spring-loaded portable sign stand, in 1975.  
It has been a pioneer in the utilization  
of vinyl retroreflective signs for highly-
effective communication with motorists 
on the nation’s highway system. We are 
continually adding new safety products 
created by our design engineers and 
manufactured at our headquarters  
located in Farmington Hills, Michigan.
 
Family-owned since 1965, MDI prides itself 
on uncompromising products and processes, 
along with exceptional and proactive 
customer service.
Traffic Control Products
1.800.521.6776 // www.mditrafficcontrol.com
Introduction

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