Abstract: A variable numeric character from which any individual numeral from zero to nine may be formed. The variable numeric character is preferably a substantially hollow rectangular figure having both a horizontal and vertical bisecting leg. Individual segments of the legs forming the variable numeric character may be removed to form individual numerals. A plurality of individual variable numeric characters may be used to produce the individual numerals of a multi-digit number, such as on a sign. Each variable numeric character may be disposed between a removable backing sheet and removable covering sheet, and may possess an adhesive or magnetic mounting surface. The vertical bisecting leg of the variable numeric character allows for the creation of a numeral one that will exhibit proper spacing and alignment when used in a multi-digit number—without requiring that the numeral one be deliberately offset or otherwise located differently than the other numerals.

Abstract: A trailer vehicle is provided with an audible alarm that is sounded when a removable activator pin in a electrical circuit is withdrawn as a consequence of initial rotation of a trailer vehicle roadway wheel during movement of the trailer vehicle from a parked condition.