Automatic headlight modification to add taillights

[Snowy]

Although I am new to this forum I really did try to search for this answer before posting. Perhaps someone knows where to find it, if it even exists. By far my biggest (and "nearly" only) gripe with my Yaris is about the tail lights not coming on when the headlights come on automatically. I believe there are reasons for everything, but this feature I just can't seem to get my head around. Surely someone must have engineered a modification to correct this nuisance by now, and if not, is anyone up for the challenge? This is an especially a bad feature if you happen to be out driving anywhere near the time of night that the bars close and were tricked into the false sense of security that all of your lights were on!