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Peter, sorry to distract from the Gunnersbury station issue but, in a way this is all very relevant because if the usage of the line can be increased it would strengthen the case for  a station upgrade.You don't need a civil engineering qualification to work out the problems that Bollo Lane presents, just a basic grasp of maths. Whether you use cantilevered designs or curved ramps the length still has to be between 67 and 102 metres. There isn't space for this at either site at Bollo Lane. I'm pleased to see that Michael has finally recognised that the only possible solution here is a lift plus steps. I need to pay a visit to the area at some point but after this discussion it seems to me likely that ultimately the way round this has to be an alternative pedestrian route along Colonial Drive with another footbridge crossing from the business park to Acton Works.As for the off-hand dismissal of the potential for technology to reduce closure times at level crossing junction this is another example of someone being unwilling to consider facts that don't support their opinions.Deutsche Bahn is using AI powered sensors and machine learning to predict train arrival times more accurately which is reducing early closure and allows gates to open more quickly after the train passes.In Japan, Hitachi’s Smart Rail System uses AI to integrate train speed, traffic flow, and weather conditions to optimise crossing closures. It is credited with a 30% reduction in wait times in urban areas.In the Netherlands, adaptive traffic signals are used to reduce queues at rail crossings. Timings dynamically change to ensure vehicles can get through before gates close. A similar system has been implemented in Florida. In Switzerland, new designs of barrier gates allow them to open and close more quickly. The West London Orbital would lead to an extra eight trains an hour crossing these lines. This is obviously going to be challenging and extra wait times are inevitable but technology will provide some ways to mitigate this issue.

Jeremy Parkinson ● 1d

Jeremy, your attempts at amateur civil engineering just demonstrate what a complete bullsh!tter you are.You don't appear to be aware that a ramp doesn't need to be one straight length but can have 'switchbacks', so overall surface area  is reduced, or can be suspended from a cantilever so the ground area only required for that structure.  I don't pretend to know guidelines for this area, but if there are lifts there may only be steps as an additional way of getting up and down rather than a ramp.So unlike you, I know what I don't know rather than your Walter Mitty approach to invent things on the basis of zero knowledge.  I still treat your postings as worthless given there will be teams of expert professionals looking at this.It is somewhat telling that you appeared to think there was some magic technology solution that would enable level crossings to maintain the throughput of cars but you think a bridge is impossible.  That's your carbrain showing yet again.Why do you think there would be detailed designs published for SotG until funding is resolved one way or the other?  Network Rail want to pay the bare minimum but pressure can be brought on them and there are other sources for funding accessible infrastructure as well, but that all takes time.I have made no claims that WLO will definitely happen because funding isn't nailed down and I have made no claims that an accessible bridge at SotG will happen because funding isn't resolved either.  You are just inventing things yet again.

Michael Robinson ● 4d

I'll leave it to others to reach their own conclusion as to whether a ramp based accessibility option would be viable at the two crossings on Bollo Lane. However. it should be borne in mind that following best practice with resting landing every five metres and using a gradient of 1:20, the ramp would need to be 112.7metres long and 2 metres wide. Even if you pushed the design to the edges of what is legal rather than what is recommended, you would only get it down to 67.2 metres and 1.5 metres wide. I make no great claim for my spatial awareness but if you think that this will fit in the existing space then I wouldn't trust you to parallel park my car. It seems to me that in your gleeful relish of the prospect of the closure of a road, you are willing to dismiss a whole range of fiendishly complex technical and practical challenges to it happening. Whether it is advancing the belief that population increases don't lead to traffic increases or the magic Tardis ramp that you envisage, your excitement over some drivers being inconvenienced has dulled your critical faculties. That's not to say that there won't come a time when a hard choice has to be made between keeping the road open and expanding the train schedule but there is no good reason to think this will happen this decade. Wishful thinking may also have got the better of you on the Strand on the Green footbridge. A qualified civil engineer spent time looking at the issue and came up with a solution that required third party owned land to be used. As Network Rail don't have the funding or the inclination to take this on nothing is likely to come of this. I don't believe valuable council officer time has been spent drawing up designs for an alternative that wouldn't require land purchase although I'm prepared to believe that some of them may have visited the site and speculated that something may be technically possible. If there are, as you are suggesting, more detailed plans which are workable, why on earth are these not being put in the public domain so that those lobbying for full accessibility at this bridge can start putting pressure on Network Rail? As with the Bollo Lane crossings, I think you are convincing yourself that things that would like to be true are true.

Jeremy Parkinson ● 4d

They tried signalising the Bollo Lane Gunnersbury Lane junction some time back and it was a disaster so they removed the signals. I've been regularly driving in to Chiswick from the A4/M4 for decades to reach the north Chiswick area. When SatNav arrived, it confirmed the route I usually took which was to exit at Chiswick Roundabout and use the High Road to get to Acton Lane. For the last few years the Sat Nav has been directing me up the North Circular and onto Gunnersbury Lane. I presume the software balances the risk of being held up by a train against that of being caught in a queue on the High Road. Call this anecdata if you like but a significant proportion of traffic travelling along Bollo Lane must be through traffic.  If the Bollo Lane level crossings are closed or much more likely to be closed then there are three potential routes that I might be directed 1) straight up Chiswick High Road 2) along the A4 to the Porsche garage or 3) up Gunnersbury Lane to reach Chiswick via Bollo Bridge Road. As 3) is a route I might choose to take anyway to reduce the risk of being held up by a train, this is probably going to be the first option but it is a bottleneck and queues will quickly develop and then the software will switch to other routes. The point here is that although through traffic along Bollo Lane would be reduced if the crossings were closed, that would only happen when congestion in the area was already so severe to increase journey times above other routes previously rejected. It isn't credible to say that these challenges won't get greater when the new buildings are fully occupied. There will be a significant increase in traffic for which it is the final destination which cannot be diverted rather than through traffic. This will have to go through the pinch points at Gunnersbury Lane/Acton Lane or Bollo Bridge Road.  A simplistic counter that this is just drivers complaining about delays in driving is dodging the problem. I don't care if 10-15 minutes is added to a journey I take occasionally. I listen to audiobooks and often welcome a bit of extra time on the road. The issue here is that the existing road infrastructure along Bollo Lane is already struggling to cope. If you are going to see a massive population increase and a closing or restriction of one of the existing access points you are going to have problems. 




Andrew OSullivan ● 7d

Michael is probably right about the business park site being closed to general traffic but there may be a deal to be done on bus routes, particularly if the level crossings are closed.However, he is wrong about technology not being considered as an option. A quick search showed up multiple examples from across the world and the UK in particular to reduce wait times at crossing. Here's a link to one but there are many more.https://www.iotm2mcouncil.org/iot-library/news/connected-transportation-news/purple-ai-monitors-level-crossings/TfL needs to sell the flats along Bollo Lane and if they were to shut the level crossings then the access problems to the site would be a huge disincentive. The right turn into Bollo Lane from Gunnersbury Lane is already regularly backed up due to the regular flow of people in and out of Acton Town station and, due to the proposed 3,000 population boost in the area, this isn't going to get any better. Ealing Council have tried and failed with various solutions to this issue. The only other remaining route in to the development is Bollo Bridge Road which narrows effectively to single file at the Acton Lane end so doesn't have the capacity to carry much more traffic.Technology should be enable a higher number of trains cross the roads at this point and TfL has a huge economic incentive to give it a try. Even if it doesn't do much to solve the problem, there are going to be queues somewhere else anyway if you close the level crossing so it achieves little.

Jeremy Parkinson ● 8d