Its earliest Metrobuses were 20 years old at that time .
Although CMB was the first to introduce Metrobuses , it withdrew only 3 of them ( all were accident victims ) before the end of its franchise in August 1998 .
CMB 's earliest Metrobuses were 20 years old at that time .
Although CMB was the first to introduce Metrobuses , it withdrew only 3 of them ( all were accident victims ) before the end of its franchise in August 1998 .