There really is a deciding factor in the size of the printing on traffic-related signs such as the one mentioned below.
So read on and learn how dimensions are determined.
What is the deal with size of lettering on expressway signs? Lake Hefner Parkway southbound sign for Northwest Highway is unusually large. Broadway Extension southbound sign for Lawton is unusually small. New signs on Interstate 40 west appear to be the usual size. How does the Oklahoma Department of Transportation decide?
The Transportation Department is among the agencies that use a specific set of rules, regulations and guidelines on such issues, Tim.
Here is the answer to your question, from Cody Boyd, in the department's media and public relations office:
“ODOT follows highway standards set in the Manual on Uniform Traffic Control Devices published by the Federal Highway Administration, most recently in 2009. The MUTCD includes standards for the size and placement of highway signs.
“The minimum size of a sign is determined by the message the sign needs to convey. A sign with three rows of information will be larger than a sign with only two rows. A sign that features an interstate shield has different size requirements than a sign with only text.
“ODOT must meet the minimum MUTCD standards for highway signs, but can also go beyond the minimum if necessary to address some traffic issue.
“The signs on Broadway Extension are the standard size. On the other hand, the exit sign on southbound State Highway 74/Lake Hefner Parkway at SH 3/Northwest Expressway is a good example of a larger sign with larger text to help drivers locate the exit.”
By the way ...
You can learn more about MUTCD and its standards by going to http://mutcd.fhwa.dot.gov.
Enjoy your week and drive safely.