Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1812 , the Kilmarnock and Troon Railway opened , mainly to carry coal from the area to the harbor at Troon , but also carrying passengers .
Simplified: In 1812 , the famous Kilmarnock and Troon Railway opened , mainly to carry coal from the area to the harbor at Troon , but also carrying passengers .