Final answer:
Montag has a difficult time getting across the highway because it is rough, untraveled, and surrounded by trees. An ordinary car would be knocked to pieces within half an hour and it is uphill, making it challenging to navigate.
Step-by-step explanation:
Montag has a difficult time getting across the highway because it is not a typical road. In the novel Fahrenheit 451 by Ray Bradbury, the highway is described as being rough, untraveled, and surrounded by trees, making it appear uninhabited and unfamiliar. Additionally, Montag mentions that an ordinary car would be knocked to pieces on the highway within half an hour, suggesting that it is dangerous and challenging to navigate. The quote from the novel also mentions that the highway is uphill, further adding to Montag's difficulty in getting across.