Deaths Caused by Car Accidents Along Highway 30 - Safety Precautions Needed

With the different intersection safety tools available to the Department of Transportation, I’m asking you to implement a blinking light (just like at highway 21 and highway 30 at the Tama/Benton County line), rumble strips on Highway V18 South towards the intersection of highway 30, guardrails around the steep ravine on the SE corner of highway 30 and highway V18 as well as the NE corner of highway 30 and highway V18 or a lit up stop sign.
The intersection of highway V18 and highway 30 has proved to be a dangerous intersection. Two men died in the accident on February 4, 2015. When I drove on that road on the morning of February 4, 2015, V18 was very slick. It usually takes the road maintenance crew in Tama County quite some time to clean up the road after a snow storm. In March 2011, another person died ½ miles East of V18. In June 2002, 3 motorcyclists died near that intersection. In order for you to understand how dangerous that intersection is, I’m enclosing pictures of the ravines of that junction. As you can see, those ravines are very steep. Can guard rails be installed around those ravines? How many fatalities will need to occur there before safe guards are implemented?
As you can see, there have been quite a few accidents on highway 30 between Tama and highway 21. At a minimum, I would like to see a flashing stop sign at the intersection of highway V18 and highway 30. Please consider implementing some of these safety recommendations before another person dies.