Tips for pumping in the car on the way to work?

I go back to work in 5 days, and I'm kind of curious about pumping on my way to work. I have a 50-60 minute drive, so I could potentially get a power pump session in. But I'm scared about being at a red light and another driver looking over and realizing what's going on. Obviously I'd be covered up (going to need to buy a nursing cover), but I was hoping to get some advice on here.