El Dorado KS 54W/77N out of route ticket

Nearly 3 years of driving under my belt I get my first ticket. I take driving a truck seriously. I route plan almost excessively. I use all the tools available using bits of each to keep myself, company and license legal. This is the first time, to the best of my knowledge, I've broken rules? Anyhow, about 9pm I'm on the side of the road heading north on 54W/77N toward I35. The officer explained I was out of route and the road I was on was restricted to trucks. I explained I route planned prior to leaving and I didn't see any signs stating no trucks. She left with my license and while she was gone I looked up again my route. Where I was. Made sure there were no restrictions listed. There wasn't. She came back with a ticket $100 for out of route and $90 for court costs. I then showed her the Rand McNally that the route is approved and that there were no restrictions. She said "I know" then explained that there were signs. She was careful when I pressed her on the signs to not be specific rather than to refer to them as signs. For example when I said I didn't see any signs that said no trucks or had a picture of a truck with a red slash she responded "Well, there are signs". So, in my downtime today I played a little with Google maps. I didn't see one sign that restricts from the road I was on. It's definitely purposely vague it seems. Apparently from what I can gather is the street right before the merger of 54/77 is called N Vine St. There's a sign right before Vine St that is obstructed by poles and other signs with arrows and truck route underneath it with 254/77 hwy however just a half block ahead there are another set of signs stating the junction of both 254/77 as well. I took some screenshots. Let me know what you think. And also notice there are no signs stating no trucks allowed. However a couple blocks after the site I was pulled over at there was a no truck sign for a cross street that was up ahead.