The conversation between human and AI assistant.
[|Human|] per this reference text about Delaware Route 16, how many times does the road change between being a divided highway and undivided?
[|AI|] DE Route 16 changes 3 times between divided and undivided highways per the information provided.
[|Human|] 
per this reference text about Delaware Route 16, how many times does the road change between being a divided highway and undivided?