across existing highway的用法和样例：
- According to deficiencies appeared in existing highway culvert, analysis of deficiencies is presented, and a comfortable treatment method suitable for the culvert structure remedy is proposed as well.
- Purpose lane system would require more extensive physical modifications to existing highways, but it promises the greatest gains in freeway capacity.
- He beckoned to me from across the street.
- In order not to be late, she cut across the fields.