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_18118221_1 (main_services VARCHAR, total_passengers__millions__2011_12 VARCHAR)

### Question ###
What is the main service for the station with 14.849 million passengers 2011-12? 

### Accurate SQL ###

SELECT main_services FROM table_18118221_1 WHERE total_passengers__millions__2011_12 = "14.849"