There are lots of neurotransmitters, and synapses that use dopamine and serotonin are actually pretty rare in the brain. This is compounded by the fact that there is a wide variety of receptor proteins for each neurotransmitter. The same neurotransmitter binding to different receptors can result in different things.
States where radar detectors are banned. According to the National Conference of State Legislatures, radar detectors are banned in all vehicles in the state of Virginia and the District of Columbia, Washington D.C. Radar Detectors are also banned in big trucks in the states of New York and Illinois.
Is it illegal to have a radar detector and a radar jammer, is a very old question. In general, using radar detector is allowed. On the other side, using a radar jammer is strictly forbidden. Most drivers use both devices, due to the fact they are more effective when used together.