How many counties are at milepost 69.5? 
CREATE TABLE table_2572788_1 (county VARCHAR, milepost VARCHAR)
SELECT COUNT(county) FROM table_2572788_1 WHERE milepost = "69.5"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2572788_1 (county VARCHAR, milepost VARCHAR) Question: How many counties are at milepost 69.5?  [/INST] SELECT COUNT(county) FROM table_2572788_1 WHERE milepost = "69.5" </s>