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_17256857_1 ( grid VARCHAR, driver VARCHAR )

### Question ###
How many drivers on the grid are called Vitor Meira?

### Accurate SQL ###

SELECT COUNT(grid) FROM table_17256857_1 WHERE driver = "Vitor Meira"