HSK 3
Yóuyú shìgù, gāosù gōnglù yōngdǔ le hǎojǐ gè xiǎoshí.
Due to an accident, the highway was congested for several hours.
HSK 7-9
Zǎo gāofēng shíduàn, shìqū dàolù yánzhòng yōngdǔ.
During the morning rush hour, the city roads are severely congested.
