NFP nano energy-absorbing road safety protection facilities are suitable for highways, roads with a medium severity of first-level highway accidents, and roads with a high-level accident severity of first-level highways and second-level highways. The remaining road sections can also be set according to protection requirements. According to the requirements of the "Code for Design of Highway Traffic Safety Facilities" (JTG D81-2017), the road section of the tunnel entrance or the tunnel gate and other facilities should be equipped with guardrails if the severity level of the accident is medium. The level requirements for setting up roadbed guardrails are: when the design speed of highways and first-class roads is 120km/h, the highest requirement for intermediate accident sections is level four (SB, SBm), corresponding to the design protection energy 280KJ. According to the "Technical Standards for Highway Engineering" (JTG B01-2014), the width of the side wall of the tunnel entrance is determined by the requirements of relevant standards, and the design value of the shoulder width. The setting of protective facilities shall meet the relevant requirements of the length and gradual change rate of the safety facilities of the tunnel entrance.