This comic is an animated gif which features an array of traffic lights which are lighted signals posted at intersections to control vehicular traffic. The standard North American traffic light has three solid lights: red, yellow and green (meaning, in simplistic terms, "stop", "slow down in preparation to stop" and "go" respectively). More complicated lights sometimes have additional signals such as arrows indicating go or stop for a specific direction such as left or right turns.
GREEN ROADS 1116
The third-from-left light has red and yellow, and later all three lights come on at the same time, then all three lights go yellow, and then reverse with green at top and red at bottom. The bottom light then becomes an arrow.
The title text mentions a straightforward intersection that allows going forward but not turning. Even though Randall is confused, in some places, a red light and a forward green arrow permits going forward but disallows turns.
Traffic signals really are one of the most inscrutable inventions to ever be made. I mean, red means stop, yellow means caution, green means go. Unless you're in a turn lane, which means you have to watch for the green arrow, if there is one, or wait for an opening. Unless you're turning right, which is permitted to turn at any time providing there aren't any cars. Unless there's a sign that says "No Right Turn On Red". There's also the crazy cities that have special right turn lights. Then there's the intersections that have a sign for each lane telling what can and cannot be done. Or, if you're really lucky one of those intersections that has the LED screen that dynamically changes what the lane can and cannot do. And to top it all off, the Colorado Department of Transportation (as well as a few other states I'm sure) are testing out a 4-stage left turn light to increase the safety of drivers. [1] Yes, you read that pamphlet correctly. There is a special 4th light, just to blink yellow, because you couldn't just make the yellow light blink, like it does anyway after 9pm. No. There has to be a whole special light that indicates when a left-turn-er must use special caution to turn.
In Poland you can sometimes stumble upon red and yellow -- while yellow alone means that there shortly would be a red, and you can proceed if you are at or almost at crossing, but stop otherwise, red and yellow is to mean that there shortly would be green (go), and to prepare oneself. But it is quite rare. JakubNarebski (talk) 06:45, 5 October 2012 (UTC)
Originally I believe all the traffic lights went through the sequence (1) green in one direction, red in another, (2) yellow in both directions, meaning "clear off the intersection" for the first direction and "get your car into gear" in the second direction, (3) red in one direction, green in another.
There are two problems though: first, when the green changes to yellow, people try to squeeze through (and it may even be difficult to stop if you're traveling at speed), second, when the red changes to yellow, people who are not stopped but carrying speed are trying to squeeze through earlier while the light is still yellow (this gets worse if the yellow is long and the incoming drivers don't know if it's after red or after green), and collisions ensue.
The solutions for these problems taken in US and Europe are different. In Europe the yellow-after-red is shown together with the red still on, strongly suggesting "no, you may not enter", and in the other direction the green often blinks once 10 seconds before it switches to yellow. In US there is no yellow-after-red, the red changes directly to green, and yellow always goes only after green (the automatic transmissions being prevalent, there is no need to shift into gear). The yellow is often long, to let the traffic on the fast roads to clear off, Also, there is usually a period of red in all directions which lets the stragglers clear off the intersection for sure before the other side goes green. This is why slipping on red just after yellow had ended is considered no big deal in US and a major no-no in Europe. 108.162.245.111 23:15, 23 January 2014 (UTC)
In Brazil some cities have greens and red in a row, and they decrease to indicate how long the green or red will last. something like _noticias/foto_1165344648.8822.jpg 189.125.162.182 20:22, 5 October 2012 (UTC)In BRazil too, in Goiânia there's a nice one here for pedestrians, with leds, that show an animated pedestrian walking and when the time is running out HE RUNS FASTER! Like, it's about to go green for the cars, but feel free to cross... IF YOU'RE FAST!
In Tianjin China they have a traffic signal that is a single bar of light. If it is green it starts subtracting bar length segments. When there is about a quarter left it turns yellow and then red. It then start subtracting bar length segments from the other end until it gets to about a quarter length and then turns green again.
Here In BC, in older installations, and I'm not sure whether any still exist, there used to be lights with 5 stages. It wasn't really any different than the standard red-yellow-green-turn combo you generally see where the turning light may come on, it just had the yellow arrow shown when the turning arrow is about to expire in it's own lamp. It behaves pretty expectantly, but it looks very imposing.
In UK, ALL lights go Red -> red AND yellow -> green -> yellow on it's own -> red again. Red and yellow means it's about to go green and yellow on it's own means it's about to go red. 141.101.98.246 21:43, 8 November 2013 (UTC)
Believe it or not,, turning right from the left lane is actually a thing in Melbourne, Victoria. They call it a hook turn, and it's used on roads with trams to stop cars stopping on the tram line while waiting to turn. The car pulls over on the left (outermost lane in Australia), and when there's a large enough gap or the lights change it turns across all lanes of traffic. Terrifying thing when you see it for the first time.Alcatraz ii (talk) 02:36, 14 October 2020 (UTC)
These Questions and Answers provide guidance for States and Metropolitan Planning Organizations (MPOs) that designate and submit CRFCs and CUFCs to the FHWA Administrator and certify to the FHWA Administrator that their designated CRFCs and CUFCs meet the requirements under 23 U.S.C. 167(e) and (f). (FAST Act 1116; 23 U.S.C. 167(g)).
First and last mile connectivity is essential to an efficiently functioning freight system. These public roads provide immediate links between such freight generators as manufacturers, distribution points, rail intermodal and port facilities and a distribution pathway. FHWA encourages States, when making CRFC designations, to consider first or last mile connector routes from high-volume freight corridors to key rural freight facilities, including manufacturing centers, agricultural processing centers, farms, intermodal, and military facilities.
During winter months, ice is open for hockey from dawn to noon, and open skating hours are from noon to dusk. The rink is free for public use and will be open when weather permits. A green sign will be posted at the gate to indicate that the rink is open; a red sign will be posted when the rink is closed. All skaters are advised that they are skating at their own risk. The rink is not supervised, and all skaters are advised they are skating at their own risk. Bring your skates and take part in this free activity!
The actual risk may be smaller because cyclists could more easily choose a low-traffic route. The substantial influence of route has been documented in various monitoring and modeling studies (Adams et al. 2001; Hertel et al. 2008; Kingham et al. 1998; Strak et al. 2010). A study in Utrecht found 59% higher UFP exposure for cyclists along a high-traffic route compared with a low-traffic route (Strak et al. 2010). Walking close to the curb in London greatly increased personal exposures (Kaur et al. 2005). For cyclists, position on the road is likely important as well, because it determines distance to motorized traffic emissions. Urban planning may also contribute by separating cycle lanes from heavily trafficked roads (Thai et al. 2008).
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