If one intersection has 4 crosswalks, with 20 lines per crosswalk, there are 20*4 = <<20*4=80>>80 lines in all the crosswalks per intersection.

If there are 5 intersections, the total number of lines in all the intersections is 80*5 = <<80*5=400>>400 lines

# Answer

400
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
While driving up a road, Philip passed through 5 intersections. 4 crosswalks marked each intersection with a total of 20 lines per crosswalk. Calculate the total number of lines of the crosswalks in the five intersections.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
400
While driving up a road, Philip passed through 5 intersections. 4 crosswalks marked each intersection with a total of 20 lines per crosswalk. Calculate the total number of lines of the crosswalks in the five intersections.
train