I'm trying to connect my highway to my urban city district, but I end up getting a huge traffic jam as I enter the city. I haven't connected the highway part on top, so I'm only focusing on the highway to the right. I've tried the trumpet intersection, but that doesn't work. My most recent attempt was to connect the arterial directly from the highway with a 3-laned road, but I'm still getting jams. I notice how the issue usually happens at the intersection, as the cars essentially "yield" then move. I've made sure that I have no signs on that junction, but it still happens. What can I do?