&gt;&gt;&gt; a) Brake light on the front of the car so that when you turn across traffic on a yellow light you can see that the oncoming car is braking.<p>Brake lights &#x2F;= stopping, or even slowing down.  They indicate that the brake pedal has been depressed 1&#x2F;8th of an inch.  They do not mean the other car sees you, is about to stop, or can stop.  The lights you suggest would create a false sense of security, leading only to more danger.  Do not ever pull in front of an oncoming car on the basis that you think it sees you and will stop.  Wait the extra 2 seconds for it to actually stop.