Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_11336756_6 ( route_name VARCHAR, remarks VARCHAR )

### Question ###
Which routes have 'replaced by US 81' listed in their remarks section?

### Accurate SQL ###

SELECT route_name FROM table_11336756_6 WHERE remarks = "Replaced by US 81"