I've noticed that the tollways never have their names on the BGS signs. The only times I've seen the Tollways' names used were on a single brown sign near their Starting sections and they include a little picture. Also I know that where 355 and 88 cross over, there's a single green sign that says N-S Tollway and E-W Tollway. I feel like the Tri-State has one but I don't know and that's one of the oldest expressways in the Chicagoland area.
The non-Toll interstates use their names on the BGS signs and even on the ones for Tollways. Just check the signs for the Circle interchange and the Stevenson / Ryan interchange, they all use their names Kennedy, Eisenhower, Ryan, Stevenson. Anyone know why this is?
EDIT: Image for reference, this was an old sign that has now been removed. The new one doesn't use Tri-State and doesn't use N-W Tollway but keeps Kennedy Expy
