Set up the CRON job:
Run crontab -e
Add this line 0,30 * * * * path_to_php path_to_folder/getRouteTimes.php >> path_to_log/file.log
Save it out
Set up the CRON job:
Run crontab -e
Add this line 0,30 * * * * path_to_php path_to_folder/getRouteTimes.php >> path_to_log/file.log
Save it out