On 21 May 2021, three small electric vehicles were delivered to a service apartment in the Sukhumvit district of Bangkok. The project will conduct an experiment on a smart modal service to connect the apartment, which is inside a narrow side road, or soi in Thai, to stations for mitigating traffic jams and CO2 emissions. The electric car, which has no CO2 emissions and a lower road occupancy rate, will serve the apartment residents through a smartphone booking application, namely the smart small vehicle service (SSVS). The results of the experiment will be used for proposing the next generation mode of transport and future streets design. Moreover, individual behaviours and preferences in travelling will be evaluated for enhancing quality of life (QOL), for which the data are integrated into a QOL-MaaS (mobility as a service) platform that proposes a better travelling and lifestyle QOL.