PURPOSES: The present study aims to evaluate the added CO2 emissions incurred from accelerating operation when to increase the speed up to the allowed level.
METHODS : The methodology used are basically the relationship between emission rates and vehicle speeds or acceleration rate. These rates together are used to calculate the added CO2 emissions incurred from accelerating operation.
RESULTS: It was resulted that the all the emission rates are increasing proportionally to vehicle speeds or acceleration rates. Additionally, it was also resulted that allowable speeds increasing, the added emission rates are increasing rapidly.
CONCLUSIONS: It may be concluded that if the allowable speed ranges are managed, CO2 emissions during vehicle operation are much reduced. From this reason, it was found that the allowable speed during highway design and operation would be much necessary

• 주진윤(경기대학교 도시·교통공학과 학사과정) | Joo, Jin Yun
• 오흥운(경기대학교 도시·교통공학과 교수) | Oh, Heung Un 교신저자