Provided is a method for making a privacy film. This eco-run control device includes: a detecting unit that detects a starting operation to start the engine; and a control unit that causes the starter to restart the engine, if the starting operation is detected during the engine stop control operation and the engine speed is lower than a predetermined speed. A light guide with a bullet-head-shaped front portion ensures total reflection of light propagating within the light guide. A first summarized risk rating based on weights of risks, a sub-category, a category, and an item is calculated.