John Thomas, Inc. | 73 followers on LinkedIn. Headquartered in Dixon, Illinois, with a nationwide customer service network, John Thomas, Inc. (JTI) has served the traffic control and roadway safety needs of state DOTs, municipalities and highway contractors for more than 20 years. From our state-of-the-art manufacturing facility, we proudly design and manufacture the trusted ADDCO™ PTS-2000 line of portable traffic signals -- the most advanced, easiest-to-deploy and simplest to operate portable traffic signals available.
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The John Thomas, Inc. annual revenue was $9 million in 2026.
John Thomas, Inc. is based in Effingham, Illinois.
The NAICS codes for John Thomas, Inc. are [33, 334].
The SIC codes for John Thomas, Inc. are [366, 36].