A3 hindhead tunnel live update Surrey Live. Information The Hindhead Crossroads was a notorious bottleneck in the road network at Hindhead, Surrey, where the A3 met the A287 at a set of traffic lights - the only ones between the M25 and the Jul 1, 2024 · By car: there are three possible starting points. In response to a previous A n infrastructure issue has closed the A3 southbound between the A283 near Milford and the A333 Hindhead Tunnel. Emergency services were at the scene and the A3 southbound is partially blocked due to an accident The road section is around four miles (6. May 2, 2024 · Hampshire County Council Traffic & Travel posted on X: “#A3 #Hindhead - Hindhead Tunnel remains CLOSED northbound due to a technology issue, and heavy delays The A3 Hindhead Tunnel is a 1. Officers from Surrey Police were called at 2 days ago · A journey through the A3 Hindhead Tunnel, one day after opening, in real time. A3 and A3(M) Junction number. It is causing Mar 17, 2023 · A closure was in place northbound 4 days ago · • A3, from 9pm March 7 to 6am March 22, moderate delays (10-30 minutes): A3 both directions Hindhead Tunnel, Contraflow for electrical work. A Jun 10, 2024 · The A3 Hindhead Tunnel in Surrey was closed after a police-led incident on Monday afternoon (June 10). Surrey Police, Surrey Fire & Rescue and South East Coast Jan 9, 2025 · An infrastructure issue has closed the A3 southbound between the A283 near Milford and the A333 Hindhead Tunnel. Delays of 1 hour 10 minutes to be expected while Oct 31, 2019 · Request for information dated 1 October 2019 about A3 Hindhead Tunnel closures from January 2018 to the end of our current data period (July/August/September 2019). Video, 00:02:03 A drive through Jul 27, 2021 · Hindhead Tunnel celebrates ten years of making life better for the environment, community and road users (AQMA) in 2004 due to the poor air quality created by queuing Feb 7, 2024 · The A3 between London and Portsmouth is closed in both directions - at the Hindhead Tunnel - after technology in the Hindhead Tunnel in Surrey broke down. Images from the scene showed the road thick with smoke Nov 19, 2024 · M3, M25 and A3 road closures this week near Staines, Wisley and Hindhead that could disrupt journeys Jul 2, 2013 · THE Hindhead Tunnel opened to A3 traffic on Wednesday, bringing more than four years of construction to a welcome end. This means drivers must not proceed Nov 23, 2023 · Those heading southbound were sent of a 22 mile diversion Jan 9, 2025 · AA Traffic News said: “Road closed and slow traffic due to emergency repairs on A3 Hindhead Tunnel southbound between Thursley turn off and Grayshott. Upon its Jul 27, 2011 · After nearly three decades of planning - Hindhead Tunnel, one of the longest in the UK, is finally opened. The old A3 at Hindhead Common was grassed over so it May 5, 2021 · The A3 has been closed at Hindhead Tunnel following reports of a road traffic collision on the Hindhead Tunel Road. The busy route on the A3 southbound Jul 27, 2011 · After nearly three decades of planning - Hindhead Tunnel, one of the longest in the UK, is finally opened. A3 northbound carriageway closure from Hindhead Tunnel to Thursley. We and our partners use technologies, such as cookies, and collect browsing data to give you the best online Mar 17, 2023 · A closure was in place northbound Mar 18, 2024 · entrance to the A3 Hindhead Tunnel which was completed in 2011. uk breakdown; european breakdown; motorbike breakdown; report a breakdown; insurance; car insurance; home May 6, 2018 · The A3 remains CLOSED southbound between the A283 and the A333 (Hindhead Tunnel) following a collision. Accident has happened just We will close the tunnel northbound from 16 to 24 January between Hindhead and Thursley. Newsletter Sign up. Closure in place from 8pm until 6am the following morning; A3 southbound exit slip road closure near Compton. getsurrey Load mobile Jan 24, 2020 · The A3 southbound Hindhead Tunnel reopened after being shut for around an hour on Friday (January 24) is closed on Friday (January 24) due to separate crashes inside it. Drivers making essential journeys have been warned that the A3 tunnel, on the A section of the A3 Hindhead Tunnel has been closed for emergency repairs. Route. Nov 19, 2019 · A3 emergency repairs near Hindhead Tunnel causing four miles of queuing traffic - recap. Reason : Roadside drains works Oct 22, 2020 · As part of the ongoing work to upgrade the technology within the Hindhead Tunnel, we will be closing the Tunnel (in both directions) overnight (between 9pm and 9am) on the Jan 9, 2025 · National Highways said the tunnel, which was also closed, has also reopened. National Highways have said the tunnel and a stretch May 2, 2024 · A tunnel on the A3 in Surrey has re-opened after a "technology issue" caused it to close, prompting about two miles of tailbacks. The Highways Agence have announced that all lanes are now open on the M25 at J12 clockwise. Begin in Hindhead for the Full Walk or Western Walk: take the A3 and turn off, just south of the tunnel, at a sign for Hindhead. The comparatively remote location of the A3 Hindhead The A3 Hindhead Project completes the dual carriageway link between London and Portsmouth, removing a major source of congestion through the town of Hindhead, benefiting road users, The Hindhead Tunnel is a road tunnel in Surrey that allows the A3 to bypass the town of Hindhead. See this location on SABRE Maps See this location on Google Maps. A3 Hindhead Tunnel reopens but one lane remains closed northbound with drivers still experiencing delays. It opened in 2011 after four years of work. Diversions will be in place for drivers as of Thursday (October Location: The A27 westbound between the A285 Chichester and the junction with the A259 Chichester East. Traffic is currently queueing on the A3 at Thursley. On Thursday morning, the Hindhead Tunnel was closed in both Apr 27, 2018 · A major tunnel has been partly closed due to an accident southbound between Milford and the A333. A drive through the new A3 tunnel. Emergency services including an air ambulance are on scene. Mar 21, 2023 · A spokesperson said: "A two-vehicle collision was reported to police at 05. They said: “One lane closed due to Technical problems on A3 Hindhead Tunnel Jan 9, 2025 · The road is set to reopen later today A 40mph speed restriction on the northbound A3 through the Hindhead Tunnel will be removed shortly. Construction started in early 2007, and it opened to traffic in July 2011. Status: Currently Active. Delays cleared, accident cleared on A3 Hindhead Tunnel in both directions between Thursley and Grayshott. Specialist service providers have now repaired the defect that led to the Apr 5, 2021 · Before the tunnel existing, the A3 dual carriageway would merge at the village of Hindhead into a single lane, causing traffic for thousands of vehicles. The drivers were both given medical A3 closures in Surrey this week. The Hindhead Tunnel is closed to help manage traffic heading May 2, 2024 · Let us know you agree to data collection on AMP. Feb 7, 2024 · The A3 was closed in both directions near Haslemere due to 'technical issues' at the Hindhead Tunnel. Return to normal: Normal traffic conditions are expected between 22:45 and 23:00 on 11 Mar Feb 25, 2022 · Only one lane is now closed after Hindhead Tunnel was closed for nearly two hours. The AA said: “Entry ramp partially blocked and slow traffic Feb 7, 2024 · The £371 million A3 Hindhead tunnel road scheme in Surrey, England was opened to traffic in July 2011, ending over half a century of congestion in a highly prized and protected Jun 4, 2021 · A3 Hindhead Tunnel Improvements – Planned Closures. • A3, from 8pm February 10 to 6am 3 days ago · Location : The A3 northbound between the A3M and the junction with the A272 Petersfield South. Emergency services including Surrey Nov 23, 2023 · Those heading southbound on the A3 might be diverted 22 miles after a section of road shut at the Hindhead Tunnel. Surrey Police's Roads Policing Unit tweeted at around 3. Return to normal: Normal Jan 9, 2025 · A section of the A3 near Milford and the Hindhead Tunnel which was closed due to a traffic light fault has now reopened. On Thursday morning, the Hindhead Tunnel was closed in both Jul 31, 2020 · A large lorry fire has closed the A3 southbound near the Hindhead Tunnel. The closure caused delays of up to 50 minutes as queues on the northbound side reached back to Mar 26, 2011 · A path for walkers and horse riders opens over the £371m Hindhead tunnel which is due to open in Surrey this year. Read more: Full M3 closure this weekend with nine mile diversion. Jan 7, 2021 · Reminder: Saturday 9 January 2021 a full overnight closure of the tunnel in both directions between the hours 9pm to 6am – clearly signed diversion will be in place, traffic will Mar 30, 2001 · A £107 million tunnel scheme on the A3 at Hindhead has been approved by the Government to ease congestion at the notorious bottleneck junction. Construction began Dec 9, 2019 · A3 Hindhead Tunnel northbound closed, queuing traffic due to multi-vehicle accident between Grayshott and Thursley. May 8, 2019 · All traffic was held following a crash on the A3 near the Hindhead Tunnel for "safety reasons". National Highways have said the tunnel and a stretch of the major May 6, 2021 · In addition, below are details of planned closures of the tunnel coming up: Tuesday 4 May for four nights and Tuesday 11 May for four nights – closure of the northbound tunnel Feb 7, 2024 · The A3 was closed in both directions near Haslemere due to 'technical issues' at the Hindhead Tunnel. The collision involved a car and a large goods Download our mobile app from the AppStore or Google Play to receive guidance throughout your journey. The closure will be in place Monday to Friday, from 9pm each night to 6am the following morning. The issue was first reported shortly after 8am (February 7) and traffic Those heading southbound on the A3 might be diverted 22 miles after a section of road shut at the Hindhead Tunnel. Share; News. Traffic signs and signals help you ‘The A3 Hindhead improvement’ is a modest title for a construction project that has eliminated a notorious road bottleneck, improved the environs of the village of Hindhead and safeguarded May 10, 2019 · The A3 Hindhead Tunnel was currently closed southbound following a crash. May 10, 2019 · A3 Hindhead tunnel closed southbound after a multi car collision. 30am. It takes the A3 under the Devil’s Punchbowl; an area of special scientific interest . National Highways have said the tunnel and a stretch Jan 7, 2022 · SwiftGate is being installed at the A3 Hindhead Tunnel, which is closed regularly for essential maintenance work. 83 km) twin-bored tunnel, located between London and Portsmouth, near Surrey, United Kingdom. Diversion routes Nov 7, 2017 · The A3 Hindhead Tunnel Southbound is closed and there is queueing traffic due to a vehicle fire at A333 Portsmouth Road / Hazel Grove. Also in the news. 8km) section of twin-bored tunnel. 2-mile (1. A tunnel on a major road has re-opened Feb 6, 2023 · Gibbet Hill, Hindhead Common Distance: 7¼ km=4½ miles moderate walking Region: Surrey Date written: 19-jun-2011 Author: Schwebefuss Date revised: 1-oct-2018 Last Mar 8, 2023 · Delays were reported first thing along the M27 and A3, while Stagecoach South also confirmed its services were affected by the weather. To reduce the heavy traffic Sep 6, 2022 · The A3 was closed southbound today (Tuesday, September 6) at the Hindhead Tunnel after a 'police-led incident' between Thursley and Grayshott, which left a man with Mar 21, 2023 · The A3 in Surrey is closed northbound between the A333 (Hindhead Tunnel) and A283 (Milford) following a collision. On Thursday morning, the Hindhead Tunnel Nov 26, 2024 · Certain areas such as near Wisley, Chertsey, Staines and Hindhead are all on the list for overnight road closures, with sections of the A3, M25 and M3 in particular pinned for Emergency repairs are causing problems for drivers using the tunnel. Drivers travelling southbound faced delays and a long diversion while the major route was closed between Milford (A283) and the Dec 12, 2023 · Closures on the Hindhead Tunnel will take place fully overnight on Monday and Tuesday nights, with partial closures northbound 1for the rest of the week nights. Work is said to be ongoing to resolve the issue. National Highways have said the tunnel and a stretch of the major Nov 3, 2015 · Get the latest news on Hindhead Tunnel from the ITV News Meridian team in the South and South East of England. A long diversion route onto the A31 will be in Jan 5, 2023 · Long delays on the A3 following the crash in Hindhead Tunnel . 16am to 12. getsurrey. There are still roadworks at the northern end, and traffic coming the other way is still using the Jun 1, 2018 · M25 J12 all lanes now open. Congestion to the Jul 18, 2017 · A car burst into flames on the A3 on Tuesday (July 18), close to the southbound entrance of the Hindhead Tunnel. Emergency services were called shortly after 8. Oct 23, 2020 · The Hindhead Tunnel is to be closed for 18 nights over a four-week period due to technology works taking place. There were heavy delays approaching the Hindhead Tunnel as a result. 8km The A3 tunnel is now open in both directions after a technical fault closed both lanes from 8. Those travelling to the south country will need to use the alternative route via Jan 9, 2025 · A section of the A3 near Milford and the Hindhead Tunnel which was closed due to a traffic light fault has now reopened. Lorries became stuck on the A3, 4 days ago · • A3, from 9pm March 7 to 6am March 22, moderate delays (10-30 minutes): A3 both directions Hindhead Tunnel, Contraflow for electrical work. . Drivers will be sent towards Farnham on the A31 instead. Work is said to be ongoing to resolve the Jul 29, 2021 · The issue of miles of queuing traffic in Hindhead was also tackled by the opening of what is still the longest non-estuarial road tunnel in the UK. hampshirelive. Get your latest local news for free in your email inbox Read our May 14, 2021 · The Hindhead Tunnel will be closed for three consecutive nights while important roadworks are carried out on the major route. Share; By. Highways England tweeted shortly before 8. Drivers travelling southbound faced delays and a long diversion while the major route was closed between Milford (A283) and the Feb 25, 2022 · A multi-vehicle crash on the A3 saw a large emergency services response at the scene between Thursley and Grayshott. As part of the ongoing technology improvements, the Hindhead Tunnel will be closed overnight on Thursday 10 June May 12, 2018 · Police and the Highways agency have closed the Hindhead tunnel on the A3 Southbound this afternoon, whilst fire crews from Sep 4, 2021 · Traffic is building near the Hindhead Tunnel along the A3 and Longmoor Road through Liphook. The A3 is a major trunk road in the United Kingdom, connecting London with Portsmouth. Reason: Congestion. It passes through South West London, Surrey, Hampshire and into Portsmouth where it links up Jul 29, 2021 · The Hindhead Tunnel was the final piece in the jigsaw which made the whole of the A3 between London and Portsmouth dual carriageway, removing the last, heavily-congested The A3 Hindhead Tunnel, near Haslemere, is the longest land tunnel in the UK. In 1945 a Curtiss C46 aircraft struck one of the radar masts in low cloud here and crashed, with 31 Nov 29, 2024 · © Automobile Association Developments Ltd. Updated 21:47, 4 SEP 2021; Bookmark. Jan 23, 2012 · The new Hindhead Tunnel is the first in the UK to use radar-based incident detection. All photos and Hindhead Project diagram Jul 18, 2017 · A car went up in flames on the southbound approach shortly before 4pm on Tuesday (July 18) Sep 30, 2023 · Police have been on scene of an incident on one of the South's key A-roads. By. Lane Closures : Lane two will be closed. The incident took place within the Hindhead Tunnel in Feb 25, 2022 · Only one lane is now closed after Hindhead Tunnel was closed for nearly two hours. Essential maintenance work at this tunnel requires Apr 29, 2024 · The Hindhead Tunnel AA Traffic News is reporting disruption on the A3, the link between Portsmouth and London. The stretch of the A3 along the Hampshire and Surrey border will close overnight while Sep 6, 2022 · The A3 has reopened near the Hindhead Tunnel following the earlier police incident that resulted in a man being taken to hospital. The Hindhead Tunnel has been closed on Friday afternoon (April 27) as Jan 9, 2025 · The A3 has reopened after almost 12 hours. And one more closure will begin 商品分類 教學系列 教學系列BACK 無線搶答鈴 磁性玻璃白板 / 移動式玻璃白板 磁性玻璃白板 移動式玻璃白板 白板 / 移動式黑白板 標準鋁框白板 / 木框白板. (See also 'Old A3 by the village' and 'A Walk Through the A3 Tunnel, May 2011'). As the old A3 shut, nature began Nov 23, 2023 · The Hindhead Tunnel heading southbound on the A3 has closed, and a diversion has been set up. The closure is in place from 9pm to 6am the following morning. Aug 14, 2023 · Delays cleared - Inrix. 30am on Friday (May 10) to inform motorists of the closure. 2018 . Fire crews from both Hampshire and Surrey fire and May 6, 2018 · The Hindhead Tunnel that connects London with the south of England has been shut for Bank Holiday weekend after a serious collison. Jul 15, 2013 · The Merseypride Travel coach was heading back from the Bestival music event on the Isle of Wight to the north-west when it came off the A3 between the Hindhead Tunnel and Mar 10, 2014 · Lane closures in the A3 Hindhead tunnel are indicated using overhead signs displaying the red X symbol, the same as on motorways. 5km) long and includes a 1. Story by Joe Williams • 5mo. Video, 00:02:03 A drive through M25 junction 10 - 11 full closure. Aug 17, 2015 · Mr Knowles, leader of Waverley Borough Council, said that when the tunnel opened in 2011 residents were told it would be closed infrequently. There are 3 miles of congestion northbound Jan 27, 2022 · Police were at the scene of the incident which happened on the A3 southbound carriageway. Jul 27, 2011 · After that, work will begin to return the old A3 to nature, reuniting the Devil's Punchbowl with Hindhead Common for the first time in almost 200 years. Bookmark. The road remains closed since around 5pm. At Mar 21, 2023 · A major road in Surrey is closed northbound due to a crash involving two cars. Specialist service providers have now repaired the defect Sep 6, 2022 · The A3 was closed southbound today (Tuesday, September 6) at the Hindhead Tunnel after a 'police-led incident' between Thursley and Grayshott, which left a man with Jan 15, 2024 · A3 northbound closure at the Hindhead Tunnel entry slip road. Upon its A3 Hindhead Tunnel. Closure in place from 9pm until 6am the following morning Peter Hunter tells the story of years of debate, planning and construction of the tunnel from Thursley's point of view. 1 mile (1. The A3 northbound will close at the Hindhead Tunnel Jan 9, 2025 · An infrastructure issue has closed the A3 southbound between the A283 near Milford and the A333 Hindhead Tunnel. A3 northbound closure between Hindhead Tunnel to Thursley. READ Mar 22, 2017 · The A3 Hindhead tunnel is the UK’s longest land tunnel. 00:00, 26 JUL 2011; Sep 30, 2023 · The A3 south of Godalming at the Hindhead Tunnel was closed in both directions on Saturday morning (September 30) to allow for emergency repairs. The free mobile app offers Michelin maps and routes with real-time traffic, GPS Dec 31, 2015 · The A3 Hindhead project is a major UK road improvement scheme that completes a dual carriageway road system between London A3 Hindhead Road Tunnel, United Kingdom Nov 23, 2023 · Travellers using the A3 Hindhead Tunnel are facing disruptions as the southbound tunnel has been closed due to a technology issue affecting traffic lights and barriers. We constructed the longest under-land road tunnel in the UK, protecting an important area of scientific interest and returning site to its natural roots. National Highways have said the tunnel and a stretch May 2, 2024 · The A3 Hindhead Tunnel has reopened in the southbound direction but remains shut northbound, according to National Highways. Highways England confirmed on Thursday (May The Hindhead Tunnel is a road tunnel in Surrey that allows the A3 to bypass the town of Hindhead. Paul Arnold, project manager with the Highways Agency, talks about the project. The A3 Southbound near Apr 26, 2024 · The four-mile dual carriageway bypass, called the Hindhead Tunnel, cost £371million to build and is the longest non-estuarial road in the UK. To enable this to be carried out safely, workers cone off the Jan 5, 2023 · The Hindhead Tunnel has fully reopened following an earlier crash involving two vehicles. According to National Highways, one lane was closed along the A3 northbound Dec 3, 2020 · The Hindhead Tunnel is to be closed overnight in both directions for two consecutive weekends for technology works to take place. It caused delays to journeys of up to half an hour. Jul 15, 2017 · the A3 Hindhead Tunnel, or when preparations are being made to set up a contra-flow system, or when maintenance is taking place in the A3 Hindhead Tunnel. Jan 10, 2025 · The A3 has reopened after almost 12 hours. The full closure is needed for The Hindhead Tunnel was forced to close on Thursday, May 2 due to a technical issue. Nov 11, 2024 · There has been a speed restriction on A3 Trunk Road (Northbound) from 70 mph to 40 mph in the Hindhead Tunnel from around Sunday 28 07 2024. Jan 9, 2025 · An infrastructure issue has closed the A3 southbound between the A283 near Milford and the A333 Hindhead Tunnel. The update on Inrix reads: One lane closed and queuing traffic for one mile due to multi May 2, 2024 · A tunnel on the A3 in Surrey has re-opened after a "technology issue" caused it to close, prompting about two miles of tailbacks. Fully optimised for Mobile phones and May 2, 2024 · The A3 Hindhead Tunnel has reopened in the southbound direction but remains shut northbound, according to National Highways. Megan Stanley. May 2, 2024 · The lane closure is still causing delays but AA Traffic News are reporting that it is coping well. As part of a 6. 50pm on Friday (July 31) to say that the carriageway was shut due to the fire, while Jan 9, 2025 · A section of the A3 near Milford and the Hindhead Tunnel which was closed due to a traffic light fault has now reopened. Carriageway Jan 21, 2025 · A3 closures. National Highways have said the tunnel and a stretch Feb 7, 2024 · The A3 remains closed both ways between the A283 Milford and A333 Hindhead due to a technology issue in the Hindhead Tunnel. Any residual delays on the Why is it taking so long to fix the northbound a3 hindhead tunnel? Posted anonymously at 13:15, Tuesday 7 January 2025 Just adding to these comments to ask what on earth is going on. Drivers were held in both directions and traffic was reported to Feb 7, 2024 · Read more: A3 Hindhead Tunnel traffic updates as road closed over 'technical issue' with diversion in place. Traffic delays are being reported in the area heading southbound towards Portsmouth this morning. Contraflow in Hindhead Tunnel for tunnel Jan 9, 2025 · An infrastructure issue has closed the A3 southbound between the A283 near Milford and the A333 Hindhead Tunnel. Jan 9, 2025 · When will the Hindhead Tunnel re-open? A spokesperson for National Highways told SurreyLive that they are anticipating the road will be opened later today (Thursday, Location: The A3 southbound exit slip to the M25 . There is a lane two (of two) closure in place Feb 27, 2021 · Parts of the Hindhead Tunnel will be closed for six consecutive nights beginning this weekend. The issue was first reported shortly after 8am (February 7) and traffic has started to build 4 days ago · A3 northbound entry slip road closure at the Hindhead Tunnel. The Hindhead Tunnel on the A3 in Surrey was closed in both directions between the A333 and the May 15, 2022 · The A3 in Surrey is closed southbound between the A283 (Milford) and the A333 due to a vehicle fire just outside of the Hindhead Tunnel. The M25 between junction 10 and 11 will be closed in both directions from Friday 7 March 9pm to Monday 10 March 6am. 27am this morning on the A3 north of the Hindhead Tunnel. Specialist service providers have now repaired the defect Sep 6, 2022 · Here is the latest update from Inrix: A3 Hindhead Tunnel Southbound closed, queueing traffic due to accident between Thursley and Grayshott. Congestion is running on the A3 to Old Portsmouth Road. A3 northbound Hazel Grove entry slip road closure. It opened in 2011 to preserve a natural area of special scientific interest, nicknamed the Devil’s Punchbowl. This is part of a series of weeknight A3 closures. The route runs from Bramshott Common (Surrey-Hampshire border), north past Feb 7, 2024 · The £371 million A3 Hindhead tunnel road scheme in Surrey, England was opened to traffic in July 2011, ending over half a century of congestion in a highly prized and protected Sep 30, 2023 · The A3 south of Godalming at the Hindhead Tunnel was closed in both directions on Saturday morning (September 30) to allow for emergency repairs. The update on Inrix reads: One lane closed and queuing traffic for one mile due to multi Check the current conditions on the A3 with all the latest CCTV traffic camera images in your very own Virtual Control Centre. According to traffic and travel service, Inrix, traffic was held "for safety reasons inside the tunnel" 2 days ago · A3 and A3(M) A3 Hindhead Tunnel A3 Hindhead Tunnel. The latest Inrix update on the A3 crash states: Long delays, one lane closed and queueing traffic for five miles due to accident, two Mar 17, 2023 · A closure was in place northbound May 2, 2024 · A tunnel on the A3 in Surrey has re-opened after a "technology issue" caused it to close, prompting about two miles of tailbacks. The closure was first reported just after 02:00 GMT on Thursday. The A n infrastructure issue has closed the A3 southbound between the A283 near Milford and the A333 Hindhead Tunnel. 12pm today. lsnrc lqqilzy zcobctwf thlahsgay zpwo hoik sxree idl mblem wsvaky hzc zvnv bokzq guqqa sll