Help with sample interview question see if this is a good question below?

If an auto manufacturer wants to conduct on the street interviews to find out what adults in the us think of the comapny'slatest tv ad campaign, and the interview uses the people at the bus stop near his home during the day as a sample population, what would an example of an erroneous conclusion one might draw from this population. What might be a more representative sample of the audience targeted by the ad: