Delete the irrelevant and redundant information to make a clearer sentence.

“At 9pm this evening, I have to meet with my group on a video call”. It’s unnecessary for the reader to know the time the narrator was born within this context.

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."