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Yeah, the cat tracks are not that sharp. Here's a cleaner image of the intersection. This is the design I would have used, funding permitting. It makes sense to have a gradual left turn anyway, since both left turns are almost always filled with semis traveling to/from the port. Probably a bit more gradual, but this is just a rough conceptual illustration. 
Varance fucked around with this message at 00:37 on Mar 15, 2013 |
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Mar 15, 2013 00:28
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 How common are protected right turn lanes like the above? I rarely see them, but it seems like they are about one of the best things to do to improve safety and throughput, since they don't require a hard 90 degree turn and can take the turn at a higher speed on green, and you get a better view of whats coming without too much blocking from the assholes who inch into the intersection on red. Is it just limits on space for how few of them I see, or cost, or what?
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Mar 15, 2013 01:07
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In Holland, those separate right-turn lanes are sometimes combined with roundabouts. That way, there's still the advantages of the roundabout, but right-turning drivers never have to mix with roundabout traffic and they can make a much smoother turn.
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Mar 15, 2013 09:51
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That's an interesting idea, though I'm not sure how you'd keep people from going the wrong way. You would need some pretty tight channelization and some well placed "DO NOT ENTER" signs. Terminal Entropy posted:
They're quite common at ramp termini here. Unfortunately, they tend to reduce safety significantly, because people can't be trusted to stay in their lane or yield properly. They're also very dangerous for pedestrians. We've been removing them wherever possible throughout the state, and will probably continue to do so until they're all gone. Carbon dioxide posted:In Holland, those separate right-turn lanes are sometimes combined with roundabouts. That way, there's still the advantages of the roundabout, but right-turning drivers never have to mix with roundabout traffic and they can make a much smoother turn. Bypass lanes at roundabouts are a different story, and are usually designed so that they can't be taken at high speed. We've got some in France that are truck-only; here's an example from my A19 project.
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Mar 15, 2013 12:17
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Cichlidae posted:That's an interesting idea, though I'm not sure how you'd keep people from going the wrong way. You would need some pretty tight channelization and some well placed "DO NOT ENTER" signs.  Local Tampa drivers are used to channelized roads.   Varance fucked around with this message at 14:15 on Mar 15, 2013 |
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Mar 15, 2013 13:51
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Cichlidae posted:They're quite common at ramp termini here. Unfortunately, they tend to reduce safety significantly, because people can't be trusted to stay in their lane or yield properly. They're also very dangerous for pedestrians. We've been removing them wherever possible throughout the state, and will probably continue to do so until they're all gone. What about when there's an intersection where due to the way the roads intersect, a normal right turn would be highly acute? Like this for example: 
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Mar 15, 2013 15:14
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Install Gentoo posted:What about when there's an intersection where due to the way the roads intersect, a normal right turn would be highly acute? Like this for example: Not ideal, but that's about the best you can do in that situation. The choices are either to channelize, leave a huge area of pavement with no islands, or restrict turns. Varance posted:Let's play with it more, shall we? Might as well give IKEA shoppers and people turning the wrong way a turnaround, too. Just need to get a few cars stuck in the channelized left turn lane to block it, but it definitely needs some do not enter and wrong way signs. Yeah, you can probably make that work. The next exercise is to try to work out the signal phasing! ----- Our first batch of inlaid pavement markings has weathered a horrendous winter. They're set in a 50mil groove (1/20 inch). Here's a nice pic I took today, to give you an idea of the scale: 
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Mar 15, 2013 18:25
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Install some RRFBs with my BRT? Don't mind if I do.
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Mar 16, 2013 04:16
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doughboy1013 posted:I know of one SPUI in the state, finished in 2006. The interchange just south of it is a fun one in itself. Eventually, the intersection between Verona Rd. and the Beltline in Madison is going to get a SPUI. However, I'm not exactly looking forward to traffic for the three years it'll take them to do it. That said, it's much needed... Looks like the I-39/90 widening project will add a bunch of new roundabouts as well (and maybe even a DDI (?!))
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Mar 16, 2013 04:45
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Baronjutter posted:They have right of way, but they're supposed to turn into a specific lane. In theory if everyone drove by the rules people could turn left and right at the same time as they're going into different lanes and traffic would be happy. But in practise people turning left might turn into the left or right lane on a 4 lane street so you can't turn right. If you got hit I have no idea who would be at fault, I'm guessing the person turning left into the wrong lane. Don't know about the rules where you live, but in California in a road with 1 left turn lane, the left turning driver and enter any lane. https://www.dmv.ca.gov/pubs/hdbk/turns.htm
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Mar 17, 2013 00:34
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Is there a reason why I-95 is losing a lane at one point in CT? I dont remember where, but it is where the road is 4 lanes, 6 around a bridge, then 4 again.
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Mar 17, 2013 15:52
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Kahta posted:Is there a reason why I-95 is losing a lane at one point in CT? I dont remember where, but it is where the road is 4 lanes, 6 around a bridge, then 4 again. It's hard to say without knowing where you mean, but there are a few cases where we have auxiliary lanes. Any idea what part of the state it's in? If you mean a BIG bridge, the Gold Star has 5-6 lanes each direction, and the Baldwin has 4. That's because both of those bridges carry significantly higher traffic than the adjacent sections of highway, as they're chokepoints. Route 1 shares the road with both of 'em.
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Mar 17, 2013 19:26
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http://www.copenhagenize.com/2013/03/closing-streets-to-cars-for-good.html?m=1 Traffic bad? Just shut down some roads.
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Mar 19, 2013 01:03
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Baronjutter posted:http://www.copenhagenize.com/2013/03/closing-streets-to-cars-for-good.html?m=1
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Mar 19, 2013 01:41
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There's been lots of mention of "rails to trails" projects in this thread. This one seems slightly different, with a mile-long tunnel being converted.http://www.bbc.co.uk/news/uk-england-somerset-20429500 posted:The tunnel will be part of a longer route which cuts through the south of Bath avoiding the hilly parts of the city for cyclists and walkers. http://www.guardian.co.uk/lifeandstyle/2013/mar/22/two-tunnels-opens-cyclists-bath But why would they turn off the lights between 11pm and 5am?
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Mar 23, 2013 15:55
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Hippie Hedgehog posted:There's been lots of mention of "rails to trails" projects in this thread. This one seems slightly different, with a mile-long tunnel being converted. Wow, you guys use lottery revenue for transportation? There's a pretty cool idea. I'm not sure why it's billed as a purpose-built bicycle tunnel; it was clearly purpose-built for trains, then refurbished. As for turning off the lights, that sounds like it'd be incredibly unsafe, both due to the possibility of collisions and the typical muggings that happen in tunnels. I wonder whether it's wide enough for an ambulance. All of our bike paths here are overbuilt to accommodate emergency vehicles.
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Mar 23, 2013 16:03
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Hippie Hedgehog posted:
A misguided sense of saving money. Although maybe they'll put up a gate to keep people out during closing time?
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Mar 23, 2013 17:38
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Baronjutter posted:http://www.copenhagenize.com/2013/03/closing-streets-to-cars-for-good.html?m=1 Wow, its so weird seeing my city (Wolverhampton, UK) being used in examples alongside San Francisco and New York City! To be fair, the ring road (which like nearly every other 60s/70s urban road project isn't finished) and subsequent pedestrianisation of the major shopping street has helped reduce traffic within the city centre. The only problem now is most of the place is run down and shops seem to be closing every other week but hey, that's the recession for ya. 
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Mar 23, 2013 18:24
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MyFaceBeHi posted:(which like nearly every other 60s/70s urban road project isn't finished) More like cancelled halfway, like pretty much all other UK ring roads.
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Mar 23, 2013 18:28
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Koesj posted:More like cancelled halfway, like pretty much all other UK ring roads. Not really, no! Ok, that one was more slightly different to its planned design but its all there in its full 70s glory, and about as scary! Also the Wolverhampton Ring Road is kinda complete, just only the collector/distributor roads are done, leaving a fair amount of space in the middle for the express road to go, just like the A1/E19 between Antwerp and Brussels. Wow, that was far too  for a Saturday afternoon!
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Mar 23, 2013 18:36
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I knew I had forgotten one of the in-depth cases from CBRD  I guess that right of way for the A4150 is never going to be used, right? At least with the E19 they built a nice big rail line inside the median from Brussels Airport to Mechelen.
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Mar 23, 2013 18:43
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It is being used in the eastern bit near the railway station, but that was to put in a bus lane for the new bus station. There is also the car park on the Western side of be ring road but that was there since the road was built. I doubt there will ever be plans for anything in the middle of the road. To be fair the road copes rather well, unless there is an accident on the road or the M6 is closed. Also, if you want a British road geek site that is more up to date than CBRD (he doesn't have time to update it anymore) then try here. It's like Wikipedia only less bickering behind the scenes and people actually know what they're on about!
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Mar 23, 2013 18:53
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nm posted:Don't know about the rules where you live, but in California in a road with 1 left turn lane, the left turning driver and enter any lane. The DMV site says: To make a U-turn, signal and use the far left lane or the center left turn lane. You may make a legal U-turn: 1) Across a double yellow line when it is safe and legal. Are they saying something like this is allowed? 
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Mar 24, 2013 03:27
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Could you shed some light on this abomination? I'm not even sure how something like this happens. http://goo.gl/maps/VmdTV
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Mar 24, 2013 03:33
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Zodijackylite posted:Could you shed some light on this abomination? I'm not even sure how something like this happens. Here's a completely unprofessional doodle:  Best way to fix a 6-way intersection is to cut it down to a 4-way by removing the lesser roads from the equation. Varance fucked around with this message at 04:32 on Mar 24, 2013 |
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Mar 24, 2013 03:53
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Zodijackylite posted:Could you shed some light on this abomination? I'm not even sure how something like this happens. Without zooming out, I took one look at it and thought, "huh. I bet it's Bridgeport." Bridgeport and the surrounding towns are full of poor engineering and dangerous roads. I have a Google Earth overlay of the 1500 most high-hazard spots in the state, and Bridgeport is a solid blob of red. Moreover, Route 1 is easily the most dangerous route in the state. It has something like 4x more sites on this list than any other state route.
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Mar 24, 2013 05:21
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What I don't get is how Connecticut has all of these terrible intersections with a long line of stuff to do, but here in Florida, FDOT's got the cash to rebuild interstates from scratch and redo practically all the major north-south-east-west routes, all at the same time. There must be an orchard of money trees in Tallahassee or something. All of the interstates, most of the US Highways and most of the state roads in Tampa Bay either have or are getting re-dos. And they're leaving provisions to send our entire interstate system into local-express lane arrangements. Oh, right, the transit system I work for is funded to the tune of 30 million a year. Total.  Edit: Green is multi-year reconstruction projects recently completed, Orange is heavy lane widening or structural rehab without reconstruction, Red is either full reconstruction or new roadway, Blue is planned multi-year stuff that kicks off within the next few years. And this is just FDOT stuff, not including local projects. 
Varance fucked around with this message at 06:59 on Mar 24, 2013 |
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Mar 24, 2013 05:30
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mamosodiumku posted:The DMV site says: To make a U-turn, signal and use the far left lane or the center left turn lane. You may make a legal U-turn: The same page does mention that U-turns like those aren't allowed in business districts.
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Mar 24, 2013 07:08
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That is one long list of exceptions to the legal u-turns section. Now I'm not sure where it is legal to make u-turns listed under the legal u-turns section. The locations listed under the exceptions cover just about everywhere save roads through the middle of nowhere.
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Mar 24, 2013 07:33
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Varance posted:What I don't get is how Connecticut has all of these terrible intersections with a long line of stuff to do, but here in Florida, FDOT's got the cash to rebuild interstates from scratch and redo practically all the major north-south-east-west routes, all at the same time. There must be an orchard of money trees in Tallahassee or something. All of the interstates, most of the US Highways and most of the state roads in Tampa Bay either have or are getting re-dos. And they're leaving provisions to send our entire interstate system into local-express lane arrangements.
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Mar 24, 2013 14:49
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Thanks!Varance posted:Best way to fix a 6-way intersection is to cut it down to a 4-way by removing the lesser roads from the equation. The gas station on the right makes it function more like a 7-way Cichlidae posted:Without zooming out, I took one look at it and thought, "huh. I bet it's Bridgeport." How many different points are the section of US-1 in Fairfield where it narrows down to one lane in one direction for a quarter of a mile, and for the latter ~500 feet of that has on-street parking, then turns back into two lanes for a five-way intersection, with two of those roads each having an entrance to the same parking lot of a Starbucks?
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Mar 24, 2013 17:29
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http://goo.gl/maps/i0d92 I've never seen this sort of intersection design... is it good?? It seems very confusing to me but it also looks kinda new so I assume they know what they're doing.
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Mar 25, 2013 03:21
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Baronjutter posted:http://goo.gl/maps/i0d92 It's just a large signaled intersection, throughput should be good.
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Mar 25, 2013 04:47
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Baronjutter posted:http://goo.gl/maps/i0d92 Koesj posted:It's just a large signaled intersection, throughput should be good.
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Mar 25, 2013 04:51
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Baronjutter posted:http://goo.gl/maps/i0d92 Oh hey, somewhere I've been! I wonder what kind of phasing they're running. Storage length can be a problem unless things are done very meticulously. You can probably guess how easily the whole thing could be gridlocked if it hits capacity. Zodijackylite posted:How many different points are the section of US-1 in Fairfield where it narrows down to one lane in one direction for a quarter of a mile, and for the latter ~500 feet of that has on-street parking, then turns back into two lanes for a five-way intersection, with two of those roads each having an entrance to the same parking lot of a Starbucks? Each intersection or section of roadway can only be counted once (unless it's the intersection of 2+ state routes). There's one intersection in Danbury where 4 state routes meet, so that has the potential to be 4 different high-hazard locations. I can't talk too much about it, though; this is technically secret information, and I couldn't tell you details even with a subpoena or FOI request.
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Mar 25, 2013 12:17
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A few of you have postulated that our sign supports will survive mankind. Well, I'll never get the chance to test that, but one of our signs in Danbury was recently hit by a tractor-trailer.        Total damage? 3 scrapes in the galvanized coating. Steer clear of these things; your big rig is no match for 'em.
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Mar 25, 2013 22:07
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Was it trying to mate with that luxury suv?
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Mar 25, 2013 22:09
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Baronjutter posted:Was it trying to mate with that luxury suv? Not sure what happened with the Infiniti. Looks like the pictures were taken last week, and I can't find anything on the Courant or WFSB about it.
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Mar 25, 2013 22:27
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Baronjutter posted:Was it trying to mate with that luxury suv? Clark Griswold got a decent Christmas bonus this year. 
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Mar 25, 2013 23:00
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Baronjutter posted:Was it trying to mate with that luxury suv? That is a sedan.
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Mar 26, 2013 02:59
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