Is this like "surge pricing" on tolls?
I thought most of the tolls are fixed to allow people know in advance what they must pay. If it increases based on demand, I think people will get mad.
I think the psychology, if any, need not go towards the two choices. But rather what people thought the "dynamic pricing" will be and that was $5-$6 on average.
People get mad at ride sharing companies for their "surge pricing" so this seems in the same mold.