How Does Relay Work?
Relay's software is programmed to follow a prerecorded path. It relies on several sensors (localization lasers, GPS, odometry and cameras) to navigate and orient in the environment and follow a predefined network of routes.
How does Relay navigate around obstacles?
Relay has various sensors and detection lasers installed all around the vehicle. The sensors and lasers help detect obstacles in several zones around the vehicle and determine the distance that separates them from the shuttle. The sensors and detection lasers are sensitive so it’s important that other vehicles do not travel or pass Relay at close distances. Drivers should keep at least ten feet between their vehicles and Relay.
What happens when unexpected obstacles comes into the path of the vehicle?
Relay's sensors and lasers are constantly scanning the area around the vehicle. The software considers the vehicle’s path and determines the vehicle’s proper reaction to detected obstacles including vehicles, cyclists, or pedestrians. In response to the environment the vehicle may slow or come to a complete stop to avoid incident. Emergency stops in response to an unexpected obstacles may be abrupt and passengers must remain seated and wear a seatbelt at all times for safety.
How fast can Relay go?
Relay operates at a maximum speed of 10 mph.
How does Relay know where it is located?
The vehicle uses a combination of GPS signal, Lidar (laser detection technology) and predefined route programing to determine its location.
How far out can the lidars see?
Relay is outfitted with 3D lidar up to 262 feet and 2D Lidar up to 131 feet. Additionally, the localization Lidar instruments can scan up to 492 feet.
What are cameras in the front and rear of the vehicle for?
These cameras are used to aid in remote supervision of the vehicle.
What is the source of power for Relay?
Four 48V lithium-ion batteries; and one 12V battery.
Relay can typically operate for 10-14 hours on a single charge. The variance depends on the specific power utilization from heat, air conditioning of other similar factors. It takes Relay's battery 6-8 hours to return to full charge.
Not to be too personal, but how much does Relay weigh?
Relay weighs 4,409 pounds.
What is Relay's maximum capacity?
Relay can hold 12 passengers or 2,200 pounds with 6 seated and 6 standing.
Due to the pandemic, service will be limited to 4 people - including the safety steward - with social distancing rules in effect.
Is Relay equipped with an emergency brake onboard?
Yes. Fail-safe brakes can be automatically activated to stop the vehicle even when there is no power, or when the vehicle is stationary.
How should other drivers interact with Relay?
I have ADA needs, can I take a ride on Relay?
Yes we encourage you to come out and take a ride on Relay. We have a ramp to get into the vehicle and we have restraints for any wheel chair or scooter that is required
Will Relay ever travel without the Safety Operator?
At this time there will always be a Safety Operator on board Relay. There are expected to be passengers with ADA needs that the Safety Operator can assist with. The Safety Operator will always be present to make sure all passengers are safe.
Relay has lots of cameras inside and outside the vehicle, is my privacy being protected?
Yes, your privacy is being protected. These cameras are on board to learn more about the movement of the vehicle and how passengers, pedestrians and other motorists interact with the vehicle.
Will Relay operate in bad weather?
Relay will operate in light to moderate weather. Heavy rain and snow does become a problem for Relay. Fairfax County Department of Transportation (FCDOT) will determine the operating status based on the severity of the weather. FCDOT will share operating status on this web page on inclement weather days.
If Relay is sick or having a bad day will I be able to get to the Mosaic District from the Dunn Loring Station?
Yes, if Relay is having any issues, a regular vehicle will serve the route on Relay’s regular schedule between the Dunn Loring Metrorail station and the Mosaic District.