user: Question: What is the highest value for multi lane if category wise is Major district roads?
Columns: ['Sl. No', 'Category wise', 'Single lane', 'Intermediate lane', 'Double lane', 'Multi lane', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'National highways', 18.0, 42.0, 2685.0, 2128.0, 4873.0]
SQL:

assistant: SELECT MAX("Multi lane") FROM "Table" WHERE "Category wise" = 'Major district roads';