A Portland, Oregon ramp meter. A ramp meter, ramp signal or metering light is a device, usually a basic traffic light or a two-section signal (red and green only, no yellow) light together with a signal controller that regulates the flow of traffic entering freeways according to current traffic conditions.
Medications such as clomipramine, which block the serotonin pump, are referred to as serotonin reuptake inhibitors or SRIs. In addition to clomipramine, several selective SRIs have been shown effective in treating OCD, including fluvoxamine (Luvox), fluoxetine (Prozac), sertraline (Zoloft) and paroxetine (Paxil).
Levodopa (L-dopa). Levodopa, or L-dopa, has been used for years and is the gold standard for treating Parkinson's disease. L-dopa increases brain levels of dopamine. It is probably the most effective drug for controlling symptoms and is used in nearly all phases of the disease.