Font Types
TxDOT uses two alphabets for signs. The alphabet types include
the Federal Highway Administration (FHWA) Standard Highway Alphabets
and Clearview.
The Standard Highway Alphabets is contained in the national (SHSM) manual. TxDOT
has adopted a version of this book and also published this alphabet information
in the Texas
.
The height of the letters, spaces between words, spaces between lines
of words, and various other details are described in this document.
This document provides details for six standard capital letter alphabets,
Series B through F, including Emod.
In 2003, TxDOT implemented the use of Clearview font for overhead
and ground mounted guide signs. This includes all signs manufactured
with a white legend on a green and brown background and some that
include a blue background. Research findings indicate that Clearview
provides increased legibility and reduces glare when used with prismatic
sheeting.
The TMUTCD requires that the Texas
be
used for all sign designs for consistency and standardization. The
Texas SHSD and the
show the appropriate letter series
for each sign using either of these fonts.