These controls include a steering wheel , pedals for operating the brakes and controlling the car's speed and, in a manual transmission car, a clutch pedal , a shift lever or stick for changing gears, and a number of buttons and dials for turning on lights, ventilation and other functions. Light truck standards have changed more frequently, and were set at This is the source of Ford's apocryphal remark, "any color as long as it's black". Please help improve this article by adding citations to reliable sources. However new controls have also been added to vehicles, making them more complex. Controls are evolving in response to new technologies, for example the electric car and the integration of mobile communications. The lever to the right controls the throttle. The benefits may include on-demand transportation, mobility, independence and convenience. Reflecting the rapid pace of change, makes shared parts with one another so larger production volume resulted in lower costs for each price range. Modern cars' controls are now standardised, such as the location for the accelerator and brake, but this was not always the case. As a result, Ford's cars came off the line in fifteen-minute intervals, much faster than previous methods, increasing productivity eightfold, while using less manpower from Vehicles using alternative fuels such as ethanol flexible-fuel vehicles and natural gas vehicles are also gaining popularity in some countries. Full-size cars and large sport utility vehicles can often carry six, seven, or more occupants depending on the arrangement of the seats. Some car hacking through on-board diagnostics OBD has been done so far. Key developments included electric ignition and the electric self-starter both by Charles Kettering , for the Cadillac Motor Company in — , independent suspension , and four-wheel brakes. Unsourced material may be challenged and removed. The assembly line forced workers to work at a certain pace with very repetitive motions which led to more output per worker while other countries were using less productive methods.