My first thought was - yeah, that'll create a lot more speeders! But actually on reflection I think there are a couple of very good side effects to come out of this:
1. The most dangerous time to speed / stop heavily is in or very near an intersection. Giving drivers more warning may actually encourage them to use the actual intersections more safely.
2. Traffic is considerably congested by the stop start nature of intersections. If this helps to more gently control cars passing through in both directions, it may considerably speed up everyone's trips (even those that slow rather than speed - keeping in mind they can then still hit the green light at say 2/3 speed rather than zero.)
Rather than having the traffic lights sending invisible signals to special receivers, they could just have digital countdown timers, visible from a distance, on both red and green lights.
I've saw a bunch of these in China, but not yet in the USA. (The closest I've seen commonly in the USA are the countdown timers, instead of blinking lights, on more recent pedestrian crosswalk signals.)
The countdown counters are about the same size as one of the lights whereas to be able to comfortably see the counter from a moving vehicle from at least 100 meters, the numbers on the counter should be humongous. After all, the main idea behind this is knowing beforehand (long enough beforehand) what the light will turn into and when so that you can accelerate just enough to make it through just before the green ends, or decelerate enough to make it to the intersection just as the green comes on so that there's no need for braking, stopping and starting again.
Yep, these are commonplace in India too. It seems like an easier & cheaper solution. Only thing is the government needs to invest in new lights. Audi got tired of lobbying/waiting, and took things into its own hands.
2. this still does not solve for calculating the speed necessary (for which to utilize as a benchmark if you're actually going to make it through the light).
in pedestrian crosswalk signals, ability to accelerate is probably an order of magnitude greater -- you go from walking to running to beat the signal.
not so with traffic lights, even if you have a visible countdown timer (and as i mentioned above, how will a human calculate the baseline speed at which it is necessary to drive in order to be able to safely cross).
I hope that the ones for cars are actually accurate, unlike the pedestrian ones which drastically underestimate the time, causing people to ignore it completely and just look both ways.
Well... the seconds are appropriately long, there just aren't enough of them, so there's plenty of time left to cross after 0. Or maybe it's just Porter Square's weirdness, to go along with the striped sidewalks and windmill and boulders...
It isn't an abuse currently. I meant allowing a censor controlled by a person to provide input into a stop light is troublesome. Just like people who get ahold of the light emergency vehicles can use in certain metro areas, having another way to try and hack the light is likely to cause problems.
I think he's referring to this line in the article: "Even better, if there's no oncoming traffic, your Audi can make the light turn green." I'm pointing out that there are lights that already do this for regular cars.
How about the traffic green light displaying seconds before it's going to turn yellow? I think this is feasible because of LEDs usage in the traffic lights.
1. The most dangerous time to speed / stop heavily is in or very near an intersection. Giving drivers more warning may actually encourage them to use the actual intersections more safely.
2. Traffic is considerably congested by the stop start nature of intersections. If this helps to more gently control cars passing through in both directions, it may considerably speed up everyone's trips (even those that slow rather than speed - keeping in mind they can then still hit the green light at say 2/3 speed rather than zero.)