Cutting.
The trees are cut down when roads are repaired by local agencies .
"The road is in repair" or "The road is under repair" or "The road is being repaired"
Because the trees where on the road but it turns out that the trees had feet
There is no specified collective noun for trees in a road; you might use an obstruction of trees, a hazard of trees, or a suitable noun of your choice.
Watch out for trees.
Trees prevent soil loss so the road stays stable because of the trees planted on both sides.
When a molar is chipped it will need to be repaired by a dentist. If the tooth is not repaired the tooth can become further damaged or possibly infected.
nothing happens to them
A boulevard is a broad street lined with trees. Sometimes the trees reach across.
before cell division happens after the old tissues have to be renewed or repaired.
No
You will have to keep adding power steering fluid.