Meaning of diào tóu:
diào tóu
掉头
Verb
to turn one's head; to turn round; to turn about
Zhèlǐ bùnéng diàotóu, qǐng jìxù zhíxíng.
这里不能掉头,请继续直行。
You can't turn around here, please continue straight ahead.
Wǒ fāxiàn qiánmiàn dǔ zhù le, zhǐhǎo diào tóu.
我发现前面堵住了,只好掉头。
I found the road ahead was blocked, so I had to turn around.
Qǐng nǐ zài xià yī gè lùkǒu diàotóu.
请你在下一个路口掉头。
Please make a U-turn at the next intersection.