CREATE TABLE table_37788 ("City" CLOB, "Operator" CLOB, "Type designation" CLOB, "Number of vehicles" FLOAT, "Width" CLOB)

Which Number of vehicles has a Type designation of u5-25 (bi-directional)?
SELECT "Number of vehicles" FROM table_37788 WHERE "Type designation" = 'u5-25 (bi-directional)'
SELECT "Number of vehicles" FROM "table_37788" WHERE "Type designation" = 'u5-25 (bi-directional)'