Skicka flera värden från formulär i samma parameter (HTML/JS)

<input type="checkbox" name="filters[]" value="f1">
<input type="checkbox" name="filters[]" value="f2">

<form id="form" action="get" target="#">
<input type="checkbox" class="filter" name="vehicle" value="Bike">I have a bike<br>
<input type="checkbox" class="filter" name="vehicle" value="Car">I have a car<br>
<input type="submit" value="Submit">
</form>

    $('#form').submit(function() {
        var filter_list = []
        $("#form input[name="'vehicle'"]:checked").each(function (){
            filter_list.push($(this).val())
        });
        var field = $('<input type="hidden" name="filter">')
        field.val(filter_list.join())
        $(this).append(field)
        return true;
    });