I agree Grand Island, NE is a good place for watching action. There is a street west of the BNSF flyover which can serve as a vantage point for watching or photographing trains on either the Union Pacific, on the ground, or on the BNSF on the flyover; the flyover is also used by unit coal trains with KCS power. Both lines are busy, and trains on the BNSF typically run with power on each end of the train so your chances of getting a photo with the power on a unit coal train on the BNSF flyover crossing over the power on a Union Pacific train are very good.
About getting nailed for 63 in a 60 mph zone. I don't recommend exceeding the speed limit any where even though it is well known few cops will stop you for less than 5 mph over the posted speed limit. I wonder what would have happened had you gone to court, and fought the ticket. How did the cop clock you? By radar? By a speedometer? If a cop gave you a ticket for 63 in a 60 zone using a speedometer you might have been able to beat the ticket. Your advice to watch your speed in Nebraska is well taken. We were out in Nebraska, South Dakota, Kansas and Missouri last year, and I noticed people driving 5 - 10 mph above the posted limits on the Interstates and regular highways with impunity. However we did have one encounter with the Nebraska State Police on our trip last year. Shortly after we crossed into Nebraska from South Dakota we ran into a Nebraska State police "reception committee" in Valentine Nebraska who stopped all vehicles to check drivers for licenses and registration, and they inspected all vehicles for the proper functioning of lights, horns, wipers etc. My wife was driving the car at the time, a Chevy Blazer rental car and she was not too familiar with all of its controls, but the cop was helpful, and he sent us on our way remarking we were a long way from home.