Some experts believe that since the 1980s, toll roads that have been market-oriented through a variety of financing channels have indeed fundamentally improved China's traffic conditions. At the same time as the serious shortage of supplies, as soon as a large price has been paid, the high-priced highways that are currently installed throughout the country have become a hard constraint affecting the sustained, rapid, and healthy development of China's economy. What does this text mean? ['It is not wise to adopt market-oriented operation of highways.', 'The healthy development of the economy needs to change the status of high tolls on highways.', 'The use of market-based highway investment management systems has outweighed the benefits.', "Highway market operation is a necessary condition for improving China's transportation."]