Hands on with Audi's exciting (no, really) traffic light countdown timer
Hands on with Audi's exciting (no, actually) traffic light countdown timer
LAS VEGAS — New Audis will count down the time until the traffic low-cal in forepart of you turns greenish. Exciting, huh? Actually, Audi is on to something fairly big. Audi'south Traffic Light Information technology has the potential to relieve fuel, smooth traffic period, and reduce commuter stress. Seriously.
Audi Traffic Low-cal Information is too the offset vehicle to infrastructure, or V2I, technology deployed in the U.s.a.. It uses Audi'southward integrated cellular modem, and this suggests on-lath cellular could be the way for cars to talk to each other rather than a carve up dedicated short range communications radio, or DSRC.
What Audi Traffic Light Information does
When the traffic light ahead turns red, if your car has Audi Traffic Light Information, an indicator shows upward in the musical instrument panel: a traffic calorie-free icon and a countdown timer with the predicted time to light-green. If your Audi has a head-upward brandish, the traffic calorie-free and timer announced in that location, besides.
When the timer gets to near three seconds to dark-green, the icon and countdown disappear, for 2 reasons, says Rick Whittemore, Audi's connected vehicle portfolio manager: Some fool (not his words) would utilise the countdown as a elevate racer'southward Christmas tree light to punch the throttle the moment the timer hits zero. Also, the timer algorithm is predictive rather than a millisecond-accurate relay of the phase alter information (traffic-speak for red to dark-green, or light-green-to-yellow-to-red; more beneath).
If y'all pull into the left-turn lane whose green signal precedes by 10 seconds the through-traffic green, TLI adjusts the time-to-dark-green inaugural not by super-authentic GPS positioning, but by the simple expedient of checking for the left-plow signal. If it's on, the machine assumes you're turning left.
All this is done via the Audi Connect cellular connexion and V2I. Information technology'due south not by the windshield lane keep assistance / forward standoff warning camera signalling when the low-cal turns green, and information technology'south not by DSRC radio in the v.9 GHz band.
On a test drive around Las Vegas, I plant the countdown was accurate in nigh cases to within a second. The driver decides when to start up past looking at the physical traffic light. In a handful of cases there was a red light that wasn't managed, and thus no data on that point. There were a few instances when the display showed a ruby-red lite alee, and so the display showed zilch even though the low-cal was still ruby-red and the car was not still at the light. That was considering there wasn't enough solid current and past information on the light to confidently projection a time to green, according to Kiel Ova, main marketing officer of Traffic Technology Services, Audi'due south partner on Traffic Light Data. The incidence of no-electric current-information blackouts should decrease, Ova says, as TTS massages more and more data.
Future applications build on TLI
In that location'south more to Audi'southward new Traffic Light Information applied science than meets the centre. What seems like a nice little application has potential to expand its value.
In the nigh term, TLI could signal a stop-start engine to restart a 2nd or two before the light goes green. On some stop-kickoff cars today, there'southward an annoying couple tenths of a 2nd while the engine cranks and restarts — plenty to make the driver think most switching off the feature. Cars with stop-start already get some credit on EPA fuel economy ratings, even though information technology can be disabled; the TLI characteristic might exist worth a footling more credit since drivers are less likely to shut it off.
Longer term, knowing how long until the adjacent phase change (until the lite turns red), the car with adaptive prowl control could slow and then coast to a stop, called-for even less fuel.
Every bit more cars add together TLI and provided anonymized speed and location data to municipal traffic centers, the navigation system could modulate speed, and traffic flow would smooth out. At that place'south general agreement within the industry that the information would truly be anonymous, but as the last couple months showed, the internet breeds conspiracy theorists.
Relax, maybe send a text at the light
Audi instrumented volunteer drivers to determine stress levels. Stress can be high, including at traffic lights. Knowing how long you have until green — most two minutes at a long crimson in Las Vegas (the above shows 109 seconds) — means y'all could exercise something useful. Audi suggests it'southward plenty time to remove your jacket if you're warm, or turn to the back seat to cheque on the well-being of your babe. You might also fish the phone out of your haversack and plug it in to accuse if it's running low on charge.
In the real world, TLI also ways you have enough time to cheque your texts and send a answer or 2. Technically, that's a violation even in a stopped machine considering you lot're not paying attending. But as long every bit you glance upwardly at the instrument panel every ten seconds, and perchance cheque the rear view mirror to make certain you're not blocking an ambulance, yous know more often than not how much time y'all've got left until light-green.
Speed upwards to clear the light? Um, perhaps
In theory, Traffic Calorie-free Information could also tell the driver to speed up to get through the light while it's still green. In theory. Almost no motorist considers information technology a ticketable offense to bulldoze 40 in a 35 mph zone when that means keeping upward with traffic. Simply automakers are less willing to embed algorithms that do what drivers already do.
Similarly, cocky-driving examination cars scrupulously heed the posted limit. Woe if you lot're stuck behind a Google exam car. Some navigation systems that bear witness the posted limit onscreen plow it from white to red when the car exceeds the limit by fifty-fifty 1 mph; you actually want to be warned when you're 5 or 10 mph over.
Here'due south an case of how TLI could reduce drive time and save fuel if Audi agreed 5 over the limit is close plenty: A car with TLI is ii football game fields away (600 feet) from a traffic light in a 35 mph zone that will switch from green to xanthous in ten seconds, and blood-red follows in iv-6 seconds. At 35 mph, the car needs 11.seven seconds to achieve the intersection, then information technology would enter the intersection halfway through the yellow phase, perhaps too close to cherry for the commuter's comfort. At forty mph, the car needs 10.2 seconds; at 41 mph, 10.0 seconds. So increasing the speed just a little would clear the still-greenish traffic light.
Conversely, with TLI beingness letter-of-the-law-abiding, it might start to ho-hum the motorcar in advance of the light. That might annoy other drivers behind and atomic number 82 to road rage. And then which is better: Fudge a trivial on the speed limit, or get flipped off? Right now, loose interpretation of the motor vehicle code is a something automakers avoid.
Why announce in Las Vegas: It's the infrastructure
Audi unveiled Traffic Light Information this week in Las Vegas, where it will exist shown more publicly adjacent month at CES. Las Vegas and southern Nevada have a high proportion of traffic light intersections that are fully monitored and managed, most 1,100 of 1,300. Even though Las Vegas is a newer urban center, the core urban areas don't have room to build more roads, says Angela Castro, senior director of government affairs, media and marketing for the Regional Transportation Committee of Southern Nevada. Mass transit eases congestion somewhat for residents. The monorail system doesn't reach residential areas; it primarily benefits convention-goers who have their own congestion concerns getting to and from their hotels the Las Vegas Convention Centre (and stops a mile or and so brusk of the airport). Information technology's not a big cistron in reducing congestion for residents. To handle a population expected to grow 25% over the next two decades, the Las Vegas region is looking to optimize traffic catamenia through better traffic signals and peradventure self-driving cars; Nevada was the first land to event license plates for autonomous vehicle testing.
Las Vegas is also ideal for trying out and implementing new technology because all the traffic low-cal data for the region flows through one facility (image to a higher place), and much of it ties to cobweb optic lines — not then much for bandwidth equally for freedom from degradation that copper cables experience.
How traffic light data gets to your car
The traffic lite information makes multiple hops before it arrives in the car and counts down time-to-green. The region's 1,100 monitored intersections tin can take every bit many as twenty lights, some with multiple timings (left turn, opposite direction left turn, directly through, crossing traffic straight through, and then on). Raw data on betoken status flows to the Las Vegas RTC offices. Some is data on fixed duration signals, significant the light is always green for, say, 30 seconds, yellowish for 4 seconds, and crimson for 30 seconds. Other data comes from variable-length signals, based on traffic flow, time of day, or an approaching emergency vehicle where the lite changes to stop crossing traffic; this is the data that needs to be massaged.
From RTC the data travels to Traffic Technology Services (TTS), the Beaverton, Oregon startup that provides information analysis for Audi and predicts the timing of each traffic lite for the next 3 minutes. TTS value comes, the company says, because "Traffic indicate controllers exercise not deliver a predicted state," or exactly when they'll change from light-green to yellow or red.
TTS shares the data with Audi and then the car via a continuous stream of 2-part data messages. One office is signal phasing and timing (SPaT), meaning the current indicate state (dark-green, yellow, red) and how long it will remain in that signal land before changing . It also sends a message about the geometry, or configuration, of the intersection, called a MAP message.
The data is transferred to Audi, which then sends information technology via Audi Connect to cars equipped to receive Audi Traffic Light Information. The latency, or delay, of the cellular connectedness is minimal, Audi says, although the latency of the full trip — traffic light to RTC to TTS (and data analysis) to Audi to car — tin can exist as much as 2 or 3 seconds. Real-time clocks factor in the time lag, so the car gets the predicted green at the correct time, non ii-iii seconds later.
When yous can go Traffic Light Data
Traffic Calorie-free Information is an Audi service. Other automakers could contract with TTS or similar vendors to massage the information; government agencies can't grant exclusive licenses to the data. BMW has an app called Traffic Light Banana that requires a connected smartphone; Audi says its TLI differs from BMW'southward TLA in offering data on lights with variable stage timing.
TLI requires an Audi A4 or A4 Allroad, or the Audi Q7 crossover, congenital June 1, 2016 or later. TLI will come to the residuum of the Audi line every bit Audi brings out a new model or mid-life refresh with the most-current MIB (High german for caput unit with modular, upgradeable components) head unit. It too requires an Audi Connect Prime subscription, the tiptop tier of Audi's telematics service. Audi Connect Prime cost $199 for half-dozen months or $750 for xxx months. Calculation Wi-Fi information for the 4G LTE hotspot adds $99 for vi months (5GB limit) or $499 for thirty months (30 GB limit); the Wi-Fi program isn't required for Traffic Light Information.
You lot don't take to specify Traffic Light Data when you buy or lease an Audi. It's office of the car's infotainment organization. If you're in an area with Traffic Low-cal Information, it shows up in the instrument panel and HUD. Cipher to buy or install.
So far, Las Vegas is the merely place where you tin can utilise Traffic Low-cal Information. TTS and Audi say they're in discussion with a dozen other The states cities to provide Traffic Light Information.
Source: https://www.extremetech.com/extreme/240264-hands-audis-exciting-no-really-traffic-light-countdown-timer
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