I am sure commuters are often annoyed by heavy traffic on roads or in tunnels . accidents often disrupt traffic and may make us late for important appointments , which can be quite costly in terms of business opportunities forgone or loved ones being angry at our arriving late 路面或隧道塞车总令人心烦，若有要事在身，偏偏再遇上交通意外，迟到可能断送生意，或叫密友大动肝火，全属兹事体大。
