100feet
You should start your signal as soon as you start to slow down for the turn. Therefore, turns at higher speed are notified sooner than turns at lower speed. Source: BMW Driving School
At least 500 feet.
yes, you have to signal your turning actions at least 100 feet.
at least 100 ft.
At least one city block. Always let the driver behind know what you are about to do.
On a busy street, at least a block or so before the turn. On a less busy street, not a block perhaps but certainly some distance before the turn.
In a business or residential area you must give a continuous turn signal for at least 100 feet before turning. In other areas the signal must be given at least 200 feet before turning. This may not be the exact law in your state but is pretty much universal in every state so it will be close.
100 feet in the city 200 feet in the country.
At least 100 feet.
Between each blink there is a space in time when the bulb is not lit. Turning signal lamps have to blink at a certain rate (at least in Britain or fail the MOT - Ministry of Transport - test certificate).
Answer 100 feet
You should allow at least 10% free drive space, for proper functioning of the computer.