South/Southwest towards Valladolid/Zamora
Take a bus or walk to the bus stop "Av.Madrid (Campus)". You will directly arrive at a roundabout. In front of "Bar el Cruze" you can stand at the exit of the roundabout between the road which leads to the highway and another small road. There is unfortunately not much space, but all the cars going to the highway will see you. I waited there for half an hour, but better expect a longer waiting time.
Other useful info
Close to the bus stop "Av.Madrid (Campus)" there is a mall with a supermarket where you can stock up your food supply ;)