Rewrite the sentences

----- Nội dung ảnh -----
```
71. most streets / roads / our city / narrow / in bad conditions
72. many people / not strictly follow / traffic laws / when using the roads
73. for example / they / cross / street / wrong places / ride / motorbikes / wrong direction
74. many street vendors / occupy / pavement / display / goods / sale / pedestrians / walk / in the road
75. the number of trucks / our city / very big / so / they / interfere / traffic flow
76. construction / houses and buildings / not carefully planned / so / they / occupy / surface of the roads
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To solve the traffic problems in our city, we should do many things.
77. we / widen / all streets / and traffic lines / more logical
```