The ASCE calculates that the US needs about $1.7 trillion of investment in surface-transportation infrastructure through 2020 to achieve a passing grade. It projects an investment shortfall of about 50% based on current funding levels.
ASCE测算，美国大约需要1.7万亿美元路面交通基础设施投资，才能在2020年获得及格分。按目前的融资水平看，预计投资缺口将高达50%。