How should your conclusion relate to your topic paragraph?
a. it should state the opposite to make readers think.
b. it should provide new information and facts.
c. it should restate it in as much detail as possible.
d. it should reflect on it without restating it.

What are you trying to ask?

The sentence needs a descriptor of exactly "what" will happen at gurley and marina. in this case, it is the light at the intersection turning green. in this case, the sentence could be rewritten as "the light at the intersection of gurley and montezuma will turn green exactly three seconds after the light at the intersection of gurley and marina."