Package(s) for traffic signs
There are only a few kinda-traffic-signs in the unicode which look like this:
% arara: lualatex
\documentclass{article}
\usepackage{fontspec}
\setmainfont{symbola.ttf}
\usepackage{booktabs}
\begin{document}
\begin{tabular}{lc}
\toprule
Sign & Example\\
\midrule
Crossing Lanes & \symbol{"26CC} \\
Disabled Car & \symbol{"26CD} \\
Car Sliding & \symbol{"26D0} \\
Circ.\ Crossing Lanes & \symbol{"26D2} \\
Chains & \symbol{"26D3} \\
No Entry & \symbol{"26D4} \\
Alternate One-Way & \symbol{"26D5} \\
Two-Way & \symbol{"26D6}\symbol{"26D7} \\
Left Lane Merge & \symbol{"26D8}\symbol{"26D9} \\
Drive Slow Sign & \symbol{"26DA} \\
Down-Pointing Triangle & \symbol{"26DB} \\
Left Close Entry & \symbol{"26DC} \\
Restr.\ Left Entry & \symbol{"26E0} \\
\bottomrule
\end{tabular}
\end{document}
The font quivira.otf
has some of them, too, which look similar. You can have a look for more fonts here.
If you are able to use Xe- or LuaLaTeX, you could search for a font like these and include the symbols to your document.
The bclogo
package (see documentation at CTAN) has some nice, colored traffic signs: