A camera’s ISO number dictates its sensitivity to light. A higher ISO (a “fast” ISO) will make your camera more light-sensitive, but will add more grain (or “noise”) to your photo. If your camera allows you to adjust ISO, set it low (somewhere around 50 or 100) for sharp detail in low-light. This setting will increase exposure time slightly, but will produce a much richer photo.The last part is getting your timing correct. You will want to look through your camera and know where the photo will actually begin. This is because you want to start your shot before any cars enter the shot