Yes, sidewalks have been installed around the P4 parking lot, as well as a pedestrian crossing on Albert-de-Niverville Boulevard.
It is possible to walk along Albert-de-Niverville and take the ramp leading to the Marriott Hotel to access door 11 on the departures level (red line) or take Place Leigh-Capreol Street to access the terminal building on the arrivals level (yellow line).
Walking time is estimated between 8 to 10 minutes.