Because road vehicles offer the convenience of point-to-point transport, added to low gas prices that make driving economical, the public is naturally inclined to buy and use cars. The result is a steady increase in the number of passenger cars, which in turn leads to congested roads, compelling continual road construction.
分析原因，由於公路運輸具有「門對門」的便利性，加上油價低廉，開車成本不高，民眾自然傾向買車開車，而小客車不斷增加，造成道路壅塞，又不得不繼續開路。