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_28723146_2 (multi_lane INTEGER, category_wise VARCHAR)

### Question ###
What is the highest value for multi lane if category wise is major district roads?

### Accurate SQL ###

SELECT MAX(multi_lane) FROM table_28723146_2 WHERE category_wise = "Major district roads"