Single riders are allowed. I've ridden alone 3 or 4 times and haven't had someone sat with me. It does throw off the "rocking" part and cause the car to lean your way.

Most likely you will be placed with someone else. I was paired with a man who was built for the NFL and felt the need to loudly narrate the ride for the benefit of his family sitting ahead of us. It is an understatement to say that it was an uncomfortable ride!Are single riders allowed on SDMT if you say 1 in your party, or do they put someone else with you to fill the seat?

It happens but it's rare. I always wondered why we were sent in line 1 or 2. CM told us that they are odd and even lines. Last trip I watched and sure enough they put odd groups in one and even in another. Since the cars fill and leave quickly they have to work fast. I imagine that time a seat leaves empty is because the next odd group is not the right number to fill the car and there is no time to call back farther in the queue so they send an even group and let that seat go.