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Automated Parking Guidance System

COVID-19 and travel at SEA Airport More Information

We want you to have an exceptional customer experience at the Seattle-Tacoma International Airport (SEA) parking garage. SEA is incorporating new technology and installing the Park Assist® automated parking guidance system (APGS) to solve many customer parking issues once inside the garage.

Elevating Efficiency and Safety

With over 12,000 stalls spread across eight floors in the Seattle-Tacoma International Airport (SEA) garage, finding an open stall quickly can be a challenge. With the Park Assist APGS, parkers will be able to find an open stall quickly using a system of wayfinding signage, smart sensors and LED lights to designate available or occupied stalls. Sensors and lighting will be installed above all drive lanes in the garage, to help you navigate the parking garage more efficiently. Each sensor also comes equipped with camera-based license plate recognition (LPR) technology to assist our Operations staff with parking policy enforcement (ex. restricted, premium stalls, overstays) and help locate your vehicle in case you forget where you parked, and motion-activated video surveillance to improve vehicle monitoring and security in the garage. 

Transitioning to Pre-Booked Parking and Variable Pricing

Installing the APGS comes with the additional benefit of being able to better transition the garage to be a mostly pre-booked parking facility. The goal is that when you pre-book, you will have a guaranteed stall in a designated location within the garage and the APGS smart sensors will assist with that. With this system, we will also be able to offer a variable pricing model that will allow SEA to offer lower pricing during times of low occupancy.

Getting Greener

We heard your feedback regarding the lack of EV stalls and we understand that the number of electric vehicles in the region is continuously rising. The APGS project will increase our EV charging capacity in the garage by nearly 50%, expanding the number and charging speed of electrical charging stations to meet public demand.

Currently, there are 48 Level 1 public parking charging receptacles in the garage that are consistently occupied. This project will nearly double the number of EV charging stations to 94 stalls, as well as provide the capability to double the vehicle charging capacity (120V vs 240V power supply). There is the opportunity for further EV stall expansion should future demand require it. This improves the customer service for plug-in vehicle drivers, while also reducing emissions from ground transportation.

Construction Phase: In Progress

Our partner for this project, PCL Construction, began installation of the system in March 2021. PCL is installing the electrical infrastructure, APGS equipment and the electric vehicle charging equipment.

The phased construction will temporarily close parts of the garage to parkers. Currently the parking closures include select areas on floors 1, 2 and 4. We estimate that 700-1,000 stalls may be unavailable at a given time.

Beginning installation of Automated Parking Guidance System on Floor 2.

Installation Timeline

Construction closures in the garage for the installation of the APGS will be present through 2022. Below is the estimated schedule for closures throughout the different parts and floors of the garage. Please note, this is an estimated schedule and could change at any time. During the periods of closures on each floor, only a few rows at a time will be impacted. If you plan to park at the airport garage during this time, please allow extra time to find an available stall.

Last updated: October 2021

Garage Floor(s) Estimated Closures for Installation
Entry Toll Booths October 2021 - November 2021 (1-2 lanes at a time)
Exit Toll Booths October 2021 - November 2021 (1-2 lanes at a time)
Floor 1 (including EV) August 2021 - October 2021
Floor 2 May 2021 - October 2021
Floor 3 April 2022 - December 2022
Floor 4 (including EV) September 2021 - June 2022
Floor 5 April 2022 - December 2022
Floor 6 October 2021 - January 2022
Floor 7 (including EV)
Floor 8
April 2022 - December 2022

Estimated Completion of APGS: December 2022

Estimated Project Costs

The APGS project is estimated to cost $21.8 million. 

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