The Chicago Municipal Device
The Y figure represents the Chicago River, north and
south branches. In some uses of the figure, the word "Chicago" appears
at the top of the circle, the words "I Will"
appear above the Y, and the words "opportunity and a square deal" appear
within the bottom of the circle.
As stated in the Municipal Code:
1-8-070 Municipal device-City vehicle identification.
The municipal device, for use by the varied unofficial
interests of the city and its people, shall show a Y-shaped
figure in a circle, colored and designed to suit individual
tastes and needs. All automobiles and other vehicles
which are owned by the city, except those used by the
commissioner of police, and the detective bureau of the
department of police, shall be distinctly marked as the
property of the city by painting or placing thereon in a
conspicuous place, in such a manner that the same cannot be
removed, the municipal device, together with the words "City
of Chicago," and the name of the department operating the
said automobile or other vehicle. (Prior code 2-7)