An automobile may have two to four foot pedals. The arrangement is the same for both right- and left-hand traffic. From left to right:
normally operated by the left foot:
clutch pedal, not in the case of automatic transmission
normally operated by the right foot:
brake pedal, which is sometimes wide and elevated above the car floor
throttle (known as the 'accelerator' or 'gas pedal'), controls fuel and air supply to the automobile's engine. It is usually narrow and close to the car floor allowing the driver's heel to rest on the car floor. It has a fail-safe design in that it automatically returns to the idle position when not depressed by the driver.
Source:
Wikipedia: Automobile pedal