General shape of the Stars solar traffic signs using rules

. a positive equilateral triangle: for the warning signs;
. b round: for the ban and signage;
. c inverted equilateral triangle: for the "slow down to let the line" prohibition signs;
. d octagon: a "stop to" ban flag;
e fork: for "railway level crossing fork symbol" warning signs:
f square: for guiding signs, some warnings, bans and Solar Traffic sign, tourism signs, auxiliary signs, notices lights.