The objective of a study on “The Strategy for Management of Environment-Friendly Expressway Maintenance in Bangkok” was to study the strategy for management of environment-friendly expressway maintenance in Bangkok under the certification of the ISO 14001 environmental management system. The sample group used in the study was 41 maintenance personnel of the Chalong Rat Expressway (Bangna-At Narong Expressway), 23 Burapha Withi Special Division Officers (Bangna-Chonburi Expressway), and 70 people of other positions, totaling 143 people. Data were collected by interviews and data were analyzed using descriptive statistics to find percentage, mean, and standard deviation. The study found that two-thirds of the respondents (74.13%) were male, aged between 40-56 years old (44.76%), received a Bachelor’s degree (49.65%), and had other types of responsibilities (55.24%), the highest average working time was more than 15 years (51.75%) and the average income was 20,001 baht or more (66.43%). In terms of management strategy, the respondents had a high level of opinions overall (Mean = 3.47) towards the strategy for management of Expressway maintenance of the Chalong Rat Expressway, Bangna - At Narong Expressway (Ramintra - At Narong and Ram Indra-Outer Ring Road), and the Burapha Withi Expressway. When considering each aspect, it revealed that the operational system average was 3.66, the shared values average was 3.55, the organizational structure average was 3.53, the management style average was 3.51, the skills and abilities average was 3.47, the strategy and plan average was 3.43, and personnel average was 3.16, respectively.