Roslyn, Washington Speed Traps

This trap was completely unreasonable. There is a stretch between Roslyn & Ronald on SR 903 where the speed limit is 45mph. Both towns switch to 25mph. The problem is, where the speed trap was is just after the 25mph for Ronald, on a curve, no possible way for them to clock someone after the posting, only before (where the speed limit was still 45mph). They’ll pull you over saying they got you going 45 in a 25. Completely wrong and unjust. To top it off, between both of these towns and before and after, there are several speed limit signs for 25mph, but in small letters up top it reads "snowmobiles". So how is one to know if it is for general traffic or just snowmobiles until it is too late?