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06-12-2010, 09:35 AM
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#1 |
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مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
السؤال الرابع وطبعا 30 درجه : Q4: 30 Marks Consider the Advanced motorway signalling and traffic management feasibility study, A report to the Secretary of State for Transport, DfT, March 2008: http://www.dft.gov.uk/pgr/roads/netw...rwaysignal.pdf. The above report is an 81 page document but this question is concerned mainly with the first two chapters (i.e about first 23 pages) of the report. Answer the following system related questions regarding the M42 ATM system described in the above report: i) 6(a) What, basically, does the system do? 3 marks ii) 6(c) What are the main objectives? 5 marks iii) 1(b) What are its components? 10 marks iv) 2(a) How can the system be broken down into functional subsystems on an activity or process basis? 12 marks بالتوفيق للجميع وعقبال ما نخلص الواجب ونوصل لهذا السؤال |
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13-12-2010, 01:54 AM
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#2 |
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
هناك وثيقة مكونة من 81 صفحة
ولكن اجابة السؤال ستكون غن الفصلين الاولين من هذه المقالة يعني عن اول 23 صفحة من الوثيقة السؤال الاول ماهو عمل النظام؟ السؤال الثاني ماهي الاهداف الرئيسية السؤال الثالث ماهي المكونات؟ السؤال الرابع كيف من الممكن تقسيم هذا النظام الى انظمة مستقلة (اصغر ) في معالجة او في نشاط ؟؟ |
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19-12-2010, 03:55 PM
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
جواب فقرة A
The M42 pilot has given us valuable experience of installing and operating a hard shoulder running system in the UK, and early results indicate benefits in relation to traffic flow, journey time reliability, emissions and compliance, at considerably lower cost than widening schemes. بس يبالها مراجعة اكثر... جواب فقرة B objectives: • To optimise safety and performance, in accordance with the volume and make up of the traffic; • To provide more consistent journey times; • To minimise harmful emissions and fuel consumption; • To reduce delays and disruption due to accidents and incidents; and • To provide improved warnings and traffic management in association with routine maintenance operations. جواب فقرة C The system includes: • lightweight gantries with Variable Message Signs around every 500m; • appropriate road markings and fixed signing; • continuous safety fencing; • Pan Tilt and Zoom (PTZ) cameras; • fixed CCTV cameras typically up to 250m intervals; • MIDAS; • semi-automatic control system (SCS); • HADECS cameras; • lighting throughout the length of the scheme; and • the necessary optical fibre cabling and communications links. بقي فقرة d فقط... بالتوفيق وأظن بكذا تقريباً جاوبنا على 99% من الواجب ...
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23-12-2010, 12:13 AM
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طالب جديد
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
بالنسبة للفقرة الأخيرة ما هي الfunctional subsystems
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26-12-2010, 09:41 AM
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
اقتباس:
وش السالفه؟؟!!  من وين اجيب المقاله؟؟ اللي معه ينزلها او يرفعها لموقع ثاني بليز.. |
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26-12-2010, 09:43 AM
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#8 |
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
لا سالفة ولايحزنون ...
اخر الجملة بعد كلمة PDF امسحي النقطة اللي تجي معك لانك تسوين كوبي بيست... وراح يفتح الموقع معك زي الحلاوة.. أو إذا ماودك تمسحين أنقري هنا : http://www.dft.gov.uk/pgr/roads/netw...rwaysignal.pdf بالتوفيق ... |
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26-12-2010, 10:01 AM
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
اقتباس:
اوكي ضبط.. بس ماشفت حلاوه  ياشين السماجه عالصبحيعطيك العافيه |
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28-12-2010, 09:29 PM
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
بصراحة دخت!
ما لقيت جواب الفقرة d 
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28-12-2010, 10:42 PM
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#13 |
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
جواب فقرة D من وجهة نظري لاني اصلاً دخت وانا افحط بالمقالة ولاحصلت شيء مباشر ..وبعد تفكير حصلت أقرب جواب الاتي..
أولاً.. السؤال يسأل عن السيستم كيف يصير سب سيستم أثناء العمل... لذا وجدت أن الأفضل اننا نكتب كيف السيستم يعمل وينظم حركة السير عبر شرح مفصل لمكوناته... أرجعوا لصفحة 11 و12 من المقالة بها شرح المكونات... The toolkit of technologies Automatic Queue Detection and Signalling 1.5 Automatic queue protection is provided through the Motorway Incident Detection and Automatic Signalling (MIDAS) system. It uses inductive loops spaced at 500 metre intervals in the road to detect slow moving, queuing or stationary traffic. MIDAS can reduce collisions causing injury by up to 13%. 1.6 MIDAS sets signals automatically to display advisory speed limits together with supplementary text messages such as ‘QUEUE AHEAD’ and ‘QUEUE CAUTION’. This protects the back of the queue from secondary collisions. The signs are mounted on cantilevers, gantries or, on older systems, on posts in the central reserve. The system is currently in operation on 1167 kilometres (41%) of the motorway network in England. MIDAS is also used as part of Controlled Motorway (CM) and hard shoulder running systems to measure the speed and flow of traffic. When used in conjunction with CM and hard shoulder running, the speed signals set by MIDAS are mandatory. Closed Circuit Television (CCTV) 1.7 CCTV monitoring on the national road network provides Regional Control Centres (RCCs) with 'real-time' traffic flow and incident information. This enables a better response to major and minor incidents by the emergency services and Traffic Officers. Rapid overview of network conditions provides up-to-the-minute information for RCCs, the National Traffic Control Centre and the traffic media. 1.8 Increased coverage of the network through the provision of additional CCTV cameras would allow the Highways Agency to detect and deploy resources more effectively in response to incidents which occur on the motorway network. CCTV is crucial to the operation of hard shoulder running, for monitoring, opening and closing the lane and for rapidly responding to incidents. It is not used for enforcement. Fixed cameras provide full 12 coverage of the hard shoulder and Pan Tilt and Zoom (PTZ) camaras provide coverage of the overall road spaca and junctions, as deployed on the M42 pilot. Advanced Motorway Indicators (AMI) 1.9 AMIs are the latest form of light emitting diode (LED) signs that display mandatory variable speed limits above lanes and can also be used to open and close the hard shoulder or any of the other lanes. There are two versions of AMI, one of which is equipped for speed compliance enforcement. The enforcement variant is linked to an enforcement system (HADECS - see below) to ensure that the correct speed limit is displayed on all AMIs on the gantry. Semi Automatic Control System (SCS) 1.10 This is a software based process which leads RCC operators through a number of logical steps for inspecting sections of the hard shoulder for obstructions via CCTV, for each link, prior to opening it as a running lane. Highways Agency Digital Enforcement Camera System (HADECS) 1.11 The HADECS system has been developed by the Highways Agency primarily to enforce the mandatory variable speed limits associated with schemes such as the M42 hard shoulder running and M25 Controlled Motorway schemes, whose safe and effective operation rely upon driver compliance with the displayed limits. The system utilises radar based speed detection by cameras mounted on the overhead gantries, linked to the AMI displaying the speed limit. The system uses digital camera technology. When in operation, all evidence is automatically retrieved and recorded at a secure Police Office. Message Signs Mk4 (MS4) 1.12 These are two-colour message signs able to display text, pictures and signals flexibly, using LED technology and can be set either by an operator or automatically. Ramp Metering 1.13 'Ramp metering' (also known as motorway access management) on motorways uses traffic lights on motorway entry slip roads to regulate the flow onto the motorway to reduce congestion. The key features are: • Traffic light signals on the entry slip road • Vehicle detection on the motorway main line and entry slip road (currently through inductive loops) to monitor congestion • Control equipment with control algorithms, which can adjust the timing of the lights based on traffic detected to help prevent queues from forming on the main carriageway 13 • Warning signs on the slip road طبعاً أختصروا الكلام ... ومن لديه حل أفضل فلايبخلن على أخوانه الطلبة... أدعوا لي عندي ميدترم الخميس والسبت..  بالتوفيق للجميع... |
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30-12-2010, 09:03 AM
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#14 |
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طالب فعال
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رد: مناقشة الواجب ( TMA 2 -Question 4 : 30 Marks )
كيف اختصر فقرررررررررررة دي
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العرض العادي
