# Review on Soft Mobility Infrastructure Design Codes
## 3 Conclusions and Recommendations
We also introduced and analyzed bicycle counting devices in France. By comparing the SMI design specifications with those of motor vehicles, we discovered the differences between them. Firstly, the motor vehicle regulations classify lanes based on purpose, and require other road participants to adapt based on the classification of motor vehicle lanes. However, the design of SMI is based on motor vehicle roads. If the classification of motor vehicle roads cannot meet the requirements of SMI users, SMI design tends to exist independently from motor vehicle roads. Secondly, the road surface layout is mainly based on road participants with faster speeds or larger sizes, including the SMI design specifications, which are more compromised to them. Except for areas with too much SMI traffic, the situation of SMI users themselves is rarely considered when designing the road surface layout. Third, in the vertical and horizontal geometric design, motor vehicle roads will formulate different design details according to different road classifications (minimum radii of crests and sags, minimum radii of transverse curves, minimum tangent length, etc.). However, SMI simply stipulates one or several values and does not specifically refine the requirements. Fourth, the speed of motor vehicles is divided into calculating speed (i.e., design speed), recommended speed, and speed limit. Different road classifications have different speed regulations. When designing a road, the road classification and the required speed need to be determined first, and then the geometry is designed. However, in SMI design, it is just the opposite. The speed regulations of the road need to be determined according to the geometric conditions of the road. Once the conditions are not met, SMI tends to abandon the setting or set it separately from the motor vehicle lane, or even take a long detour to meet the requirements. Fifth, in terms of the requirements for stopping sight distance, the regulations of motor vehicle roads and SMI are relatively similar among these items. They both have formulas and charts to clarify. The only difference is that not all countries cite these formulas and charts in SMI specifications, resulting in the SSD regulations of some countries and regions still only giving a number to stipulate the matter, even though the formulas and charts are very clear and detailed. Finally, regarding the setting up of roadside facilities, the motorway and SMI have the same guiding facilities. Both have provisions for signs and markings. However, SMI rarely has provisions for traffic control facilities such as traffic lights, because such facilities are mainly uniformly regulated in the specifications of motorway. At the same time, due to the characteristics of SMI users, which are small in size and highly flexible, but more affected by the environment, end-of-trip service facilities (such as changing facilities, shower facilities, vehicle maintenance facilities, etc.) are relatively convenient to set up, and more countries and regions have made regulations and requirements for this. Based on the above findings, we believe that the existing SMI design specifications, laws, and regulations should be optimized in the following aspects. First, the formula used by CN to determine the width of SMI facilities based on the traffic flow (or expected traffic flow) on the SMI facilities should be analyzed and promoted in various places. The cross-slope set based on drainage and anti-skid angles in places such as DK and ZA should also be considered. At the same time, there is currently no precedent for setting different height clearances based on the height differences of different ethnic groups in different regions, but the relationship between them and whether they should be considered is worth exploring. Similarly, the practice of setting up rest platforms or increasing lane width when the slope exceeds a certain level, as represented by WA and NJ, should be shared and promoted.