What is the main purpose of "Lock On Road?" Should I turn it ON or OFF?
Very useful turn OFF of "Lock On Road" when you go in immediate proximity to road and you want see real position on the contrary a projection to road with turn ON of "Lock On Road".
On some devices and SW also you can store real tracks by existing roads only if turn OFF of "Lock On Road".
"Lock On Road" function work only on maps with routing usually.
Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".