Now, since the original story I'm going to tell failed. I decide to continue to explore what if these 26 crashes could be prevented if there are more traffic lights? This leads to the question how can we improve the transportation infrastructure to reduce crashes. If taken 250 meters as a minimum distance that two traffic lights can be set up next to each other (because too many traffic lights will cause problems to the mobility of automobiles), we can see which spots are available to set up more traffic lights (figure below).