## 5 Results and Suggestions  
Under the scenarios of the expressways and secondary motorways in China, the impacts of ICVs with SLADS on traffic efficiency and CO\({}_{2}\) emissions were studied in this paper. It was indicated that ICVs with SLADS can remarkably reduce traffic delay and improve road capacity under high volume input while these benefits are not significant under low-to-medium volume input. Under high volume input, ICVs with SLADS can significantly reduce the CO\({}_{2}\) emissions per vehicle on expressways (three lanes in one direction), but the opposite effect is obtained on secondary motorways (one lane in one direction). Additionally, the impacts of the aggressive style ratio of ICVs were also discussed. We found that adjusting the parameters of SLADS to appropriately increase the aggressive style ratio of ICVs can make full use of the SLADS advantages, which is expected to reduce traffic delay and the CO\({}_{2}\) emissions per vehicle and improve road capacity. It is concluded that with the rise in ICV penetration rate, SLADS shows more considerable benefits in complex and high-volume traffic scenarios. When the volume input is not lower than the saturated level, the traffic optimization effects of SLADS is much higher than that of the volume input at low-to-medium service level. Furthermore, improving the aggressive style proportion of ICVs can further amplify the optimization effect. Therefore, we suggest that drivers should be encouraged to turn on SLADS on expressways, secondary motorways or similar road types with high volume, and avoid overly conservative driving behaviors, which can not only reduce commuting time and optimize travel experience, but also save energy and reduce emissions, and contribute to the country's \"carbon neutral\" goal. The conservative driving style of human drivers in China, however, accounts for close to 50% due to personal characteristics and the strict traffic laws and complex traffic conditions in China. As driving schools are still the only places for human drivers to learn driving and apply for a driver license, the state can try to urge driving schools to increase the explanation of the relationships between driving style, traffic efficiency and energy consumption for trainees. They are supposed to not only obey the laws and ensure safety, but also to improve the efficiency and avoid becoming a \"mobile bottleneck\" on the road. In addition, it is indicated that SLADS shows the ability to improve road capacity. In the future, with the maturity of more functions of advanced driver assistance and IoV and the continuous rise of ICV penetration rate, ICVs themselves can not only realize the high level of intelligence, but can also interconnect with other vehicles, infrastructures, and cloud platforms to make swarm intelligence come true. As a result, ICVs are likely to exert much more remarkable influences on road capacity in the future. Therefore, it can be boldly speculated that the road construction standards will also alter. For instance, when the ICV penetration rate reaches a certain level, a road that is reduced by a lane may also be able to meet the travel demand, so that the costs of road infrastructure and maintenance can be greatly reduced. Furthermore, it can also reduce the land occupation area and increase the green area, promoting the absorption of the greenhouse gases. As for the research directions in the future, on the one hand, the effects of both horizontal and lateral intelligent functions of ICVs will be studied in richer traffic scenarios, and the functions of the IoV will be considered so as to depict the intelligent and connected functions of ICVs more comprehensively. On the other hand, discussions on ICV powertrain types will also be included since electric vehicles are much more likely to be carriers of ICVs, which will have new influences on vehicle power performance and energy consumption.