satman2222 Â Â 10 #145 Posted October 15, 2015 So will we get 4 working lanes across the Tinsley viaduct? Â Â Â . Share this post Link to post Share on other sites Share this content via...
geared   268 #146 Posted October 15, 2015 So will we get 4 working lanes across the Tinsley viaduct?  Per side or in total? Share this post Link to post Share on other sites Share this content via...
truman   10 #147 Posted October 15, 2015 So will we get 4 working lanes across the Tinsley viaduct?   .  Each way? Doubt the bridge is strong enough to take it... Share this post Link to post Share on other sites Share this content via...
geared   268 #148 Posted October 15, 2015 Each way? Doubt the bridge is strong enough to take it...  Last time the bridge was strengthened it was then immediately reduced to 2 lanes and has been ever since, I doubt they will stick more lanes in now. Share this post Link to post Share on other sites Share this content via...
jamie0114 Â Â 10 #149 Posted October 15, 2015 There'll be 3 running lanes and a hard shoulder on the viaduct when the schemes finished in both directions Share this post Link to post Share on other sites Share this content via...
truman   10 #150 Posted October 15, 2015 There'll be 3 running lanes and a hard shoulder on the viaduct when the schemes finished in both directions  Where's that from Jamie? Share this post Link to post Share on other sites Share this content via...
Cyclone   10 #151 Posted October 16, 2015 There'll be 3 running lanes and a hard shoulder on the viaduct when the schemes finished in both directions  Didn't it have reinforcement works recently just to be able to continue to run 4 lanes in total. It'll need rebuilding totally to run 6 or 8 won't it? Share this post Link to post Share on other sites Share this content via...
jamie0114   10 #152 Posted October 16, 2015 Where's that from Jamie?  I've seen the lane layout drawings  Didn't it have reinforcement works recently just to be able to continue to run 4 lanes in total. It'll need rebuilding totally to run 6 or 8 won't it?  No it's fine as it is to have 3 running lanes in each direction, it doesn't need any further strengthening work Share this post Link to post Share on other sites Share this content via...
Haydn1971 Â Â 10 #153 Posted October 16, 2015 Didn't it have reinforcement works recently just to be able to continue to run 4 lanes in total. It'll need rebuilding totally to run 6 or 8 won't it? Â The works finished in c2005 made the viaduct structurally sound for three running lanes and a hard shoulder in each direction. Prior to reopening, discussions with the police resulted in an agreement to operate with a lane drop and lane gain at both ends resulting in current two running lanes in each direction over the viaduct. My understand is that principal of a lane gain, lane drop will remain, thus four lanes on approach (ALR*), lane drop to three running lanes and hard shoulder over the viaduct, then lane gain back to four lanes (ALR). Â * ALR = All Lane Running Share this post Link to post Share on other sites Share this content via...
Cyclone   10 #154 Posted October 17, 2015 So given that the capacity of a road is determined by it's narrowest point, it's a complete waste of time and money to expand the rest of the nearby M1 to have 4 running lanes, as all that traffic MUST fit into 3 lanes to cross the viaduct. Share this post Link to post Share on other sites Share this content via...
truman   10 #155 Posted October 17, 2015 So given that the capacity of a road is determined by it's narrowest point, it's a complete waste of time and money to expand the rest of the nearby M1 to have 4 running lanes, as all that traffic MUST fit into 3 lanes to cross the viaduct.  Wouldn't that only be an issue if all 4 approaching lanes were completely full? Otherwise you might as well say converting any of the M1 to 4 lanes is a waste...and converting any of the A1 to 3 lanes must be a waste as well... Share this post Link to post Share on other sites Share this content via...
Haydn1971 Â Â 10 #156 Posted October 17, 2015 (edited) So given that the capacity of a road is determined by it's narrowest point, it's a complete waste of time and money to expand the rest of the nearby M1 to have 4 running lanes, as all that traffic MUST fit into 3 lanes to cross the viaduct. Â Not quite, traffic over the viaduct is 70% of that to the south of Tinsley roundabout. Â Actual figures from 2009 are J35-34 = 114k AADT viaduct = 80k AADT J34-33 = 113k AADT Â These have increased - not got access today to current but point made is that a lane drop from 4 to 3 lanes is appropriate here. Edited October 17, 2015 by Haydn1971 Share this post Link to post Share on other sites Share this content via...