Track maintenance in indian railways. 3 Type of Tolerances 79 – 89 7.
Track maintenance in indian railways Nov 3, 2024 · The Indian Railways has recently signed a Memorandum of Understanding (MoU) with the Federal Department of Environment, Transport, Energy and Communications (DETEC) of Switzerland to boost up Technological cooperation, track maintenance and enhancement of track infrastructure. Dec 13, 2024 · Union Railway Minister Ashwini Vaishnaw recently inspected the Integrated Track Monitoring System (ITMS) at New Delhi Railway Station, marking a significant step in modernising India’s railway network. Oct 11, 2018 · Speaking during the machines handover ceremony, Indian Union Railway Minister, Mr. Jun 24, 2024 · Brief about Indian Railways – It plays a pivotal role in India’s economic landscape. The new automated OMRS system is part of Indian Railways’ “SMART Yard” initiative and will improve the availability of the railway’s fleet of coaches, wagons, and locomotives by detecting and Sep 14, 2022 · The track maintenance model’s best operational performance in terms of maintenance policy, maintenance cost, and reliability metrics is being evaluated and debated. Correction slips issued – 17 Total 9 chapters. Gopalkrishnan Director Indian Railways Institute of Civil Engineering, Pune. Nov 11, 2024 · Railway Track Maintainer Recruitment 2025| Upcoming Railway Group D Jobs Opening Notification. The primary duty of maintaining the track lies with the civil engineering branch headed by the principal chief engineer stationed at the head quarters of each zonal railway. Dec 16, 2022 · The various steps taken by Indian Railways in this regard are as under: (1) Track: (i) The maintenance of Tracks on Indian Railways has been revolutionized by the introduction of mechanized track maintenance using technologically advanced machines like High Output Tamping & Stabilizing Machines (HOTS-3X), etc. system of Indian Railways till few years back was only 100 kmph. According to Railway Ministry, the 09-3X Dynamic Tamping Predictive maintenance and efficiency optimization in Indian Railways using machine learning techniques represents a transformative approach to modernizing the country's vast railway network. 0 TURNOUTS 6. Plasser India is a subsidiary of the Austrian company Plasser & Theurer, a global leader in the design and manufacture of the most cutting-edge machines for track maintenance, track laying as well track renewal. One gang is attached to each section for maintaining that section in good condition. 0 TIES AND FASTENINGS 4. Piyush Goel said, “ The Indian Railways has planned for complete mechanization of inspection, monitoring relaying and maintenance of railway track to switch over to complete mechanized maintenance regime by 2020 on trunk route and by 2024 on the entire network 5 days ago · Railroad - Track Maintenance, Repair, Safety: Modern machinery enables a small group of workers to maintain a relatively long stretch of railroad track. , the Section PWI, who is Jun 19, 2024 · The railway ministry plans railway maintenance in advance. which has its own advantages. By November 2023, around 3000 kilometers of track renewals were completed , meeting 66% of the annual target . 36 5 Construction of new goods shed at Boisar 5. 1 Need for Offline printing software 91 8. 0 RAIL AND JOINTS 5. 82 9. OHE, GS, Rolling Stock Maintenance etc. 2 Track Management System 92 – 100 (TRC & OMS Module) Box Normalized SD value 100 ESPM India (Engineering Services Putmash India Ltd. 8 Track renewal works on Indian Railways During the last five years, Indian Railways spent an average of Rs. Dec 22, 2022 · The various steps taken by Indian Railways in this regard are as under. Engineering Track Maintenance Field Handbook Table of Contents Revision: November 13, 2024 Contents-1 TABLE OF CONTENTS 1. Identifying Shortcomings and Areas of Improvement by the field engineers during the inspection and maintenance of Railway bridges, so that our tradition of caring for bridges with high order of reliability can be kept up. The total coach holding would increase to about 576 i. Overview of the Pioneering Analysis Undertaken in Track Maintenance Systems 2. The system should have capability to give warning of approaching train minimum 30 sec (configurable) in advance to track maintenance and other staff working at site. Track monitoring through visual inspection, residual life of fastenings, riding quality, track geometry measurement, track parameters recording during maintenance, ultrasonic testing, and rail profile measurement is already done on Indian Railways. Dec 12, 2024 · The Integrated Track Monitoring System is expected to provide real-time, precise data on track conditions, enabling safer, more efficient, and manageable operations for track maintenance teams Organization Structure for Track Maintenance . Dec 15, 2024 · Indian Railways has announced the launch of its Integrated Track Monitoring System (ITMS), a state-of-the-art project aimed at enhancing rail safety and efficiency nationwide. 0 RIGHT OF WAY AND OTHER FACILITIES GLOSSARY Addressing the MoU signing ceremony, Union Minister of Railways, Information & Broadcasting, and Electronics & Information Technology, Shri Ashwini Vaishnaw said this MoU will provide comprehensive framework for collaboration to the Indian Railways in various areas, including technology sharing, track maintenance, management and construction The system shall be capable of working in Indian Railway Service Conditions. A web-based online monitoring system for track assets, including a track database and decision support system, has been adopted to optimize maintenance requirements. G. track machines used in Indian Railway to S&T Staff and safety precautions to be taken while working of track machines. We have earned a pan-India reputation for our innovative solutions and top-quality equipment utilized in the railway industry. 14 4. Jan 4, 2020 · INDIAN RAILWAYS TRACK MACHINE MANUAL, SCHEDULE OF MAINTENANCE, INFRASTRUCTURE FACILITIES ETC. Dec 18, 2024 · The Indian government is enhancing the working conditions of railway track maintainers by upgrading safety gear and introducing mechanized maintenance. The machines have enabled Indian Track Machines were introduced on Indian Railways during the early sixties. These include activities to be undertaken on a regular basis within a year (regular maintenance) and activities which are undertaken after a year (periodical). 00LS Sub total (5) 5. May 12, 2023 · Advantages of Track Maintenance. Railway tracks are subjected to preventive as well Dec 10, 2024 · The initiative is designed to enhance the safety and efficiency of India's vast railway network by using cutting-edge technology to improve track inspections and maintenance processes. Jun 30, 2020 · Indian Railways has achieved 100% target of installing Bio-toilets in trains by introducing more than 2,45,400 bio-toilets in railway coaches under the ‘Swachh Rail, Swachh Bharat’ campaign. Organisation Structure; Board Members/General Managers; Vision; Statistics; Mission; Railway Board Directorates; Citizen Charter; Portal Policies; Information available U/s 4(1)(b) of RTI Act ; IPR of Railway Officers; Archives Dec 6, 2024 · Minister Vaishnaw emphasized that ITMS will play a pivotal role in ensuring the sustainable development of Indian Railways, leveraging real-time data to predict maintenance needs and improve Oct 29, 2024 · Addressing the MoU signing ceremony, Union Minister of Railways, Information & Broadcasting, and Electronics & Information Technology, Shri Ashwini Vaishnaw said this MoU will provide comprehensive framework for collaboration to the Indian Railways in various areas, including technology sharing, track maintenance, management and construction Indian Railway Institute of Civil Engineering, Pune Oct 23, 2020 · Included in this In-Depth Focus: The power of big data: Smart maintenance using data analytics; Priya Agrawal, Deputy Chief Signal and Telecom Engineer at Indian Railways, explores how the fourth largest railway network in the world is taking a smart approach in shifting from periodic maintenance to condition-based and predictive maintenance regimes. The initiative follows the introduction of new track maintenance technology by inducting 13 09-3X Dynamic Tamping Express machines. 0 TRACK GEOMETRY 3. The share of Indian Sep 17, 2024 · In a recent move, the Railway Board directed all zonal railways to consider outsourcing the maintenance of machinery essential for track renewal. 15. In India track maintenance has traditionally been done by manual effort. needs of the field officials. 3. JPG 3,648 × 2,502; 2. 1 BT). •TMS will help to save close to 200 trees a year. The machines have enabled Indian . When a track is adequately maintained, passengers may travel safely and comfortably; however, if the track is unmaintained, passengers may experience discomfort and, in the worst circumstances, hazardous conditions that could result in vehicle derailments and subsequent loss of life and property. Jul 30, 2018 · Indian Railway has planned for complete mechanization of inspection, monitoring, relaying and maintenance of Railway track to switch over to complete mechanized maintenance regime by 2020 on trunk route and 2024 on an entire network of Indian Railway. Railway Board appointed a committee to review and railway maintenance machines play a very significant role. For worki ng of these machines, instructions had been issued by the Railway Board and Zonal Railways from time to time. TRACK MAINTENANCE 2. Audio Frequency Track Circuits have been installed on various stations as well as sections of Indian Railways including Intermediate Block Signalling and Automatic Signalling sections. Jun 5, 2023 · A report titled “Derailment in Indian Railways” was released in 2022 by the Comptroller and Auditor General of India (CAG). 31 4. Sep 17, 2024 · The Railway Board has instructed all zonal railways to explore the possibility of outsourcing the maintenance of machines used in track renewal operations to address the shortage of staff due to May 12, 2023 · As the Railways gears up to drive India’s infrastructure growth, the Ministry of Railways is looking away from traditional methods of financing track laying and maintenance machinery on its own Sep 7, 2024 · Aimil Ltd. May 22, 2019 · The book is like a Bible on track technology and has been serving as a useful guide to all railway professionals for last 46 year (1973-2019) The book contains 30 updated chapters comprising about 1100 big size pages with about 450 computer developed drawings. Additionally, measures addressing welfare and eliminating wage disparities are being implemented. Track Machines on Indian Railways have been categorized as Small Track Machines & Large Track Machines. Track has been maintained manually with the help of ‘beater packing’ by manual labor for over a century on Indian railways and the performance has been excellent. 1 INTRODUCTION Railway track can be maintained conventionally by manual labour or by modern methods of track maintenance like Mechanical tamping. In this system a programme of track maintenance works to be done cyclically as per calendar on an yearly Dec 22, 2022 · The various steps taken by Indian Railways in this regard are as under. In FY 2015, Indian Railways transported 8. Indian Railways: On the fast track to growth 1 The mammoth Indian Railways owns the world’s third-largest network (66,000 route km) and operates over 21,000 trains every day 1. 14. While revising the Manual, the provisions in the Indian Railway General Rules 1976, Indian Railways Code for the Engineering Department and Indian Railway schedule of Dimensions have been taken in to account. [ a ] As of 2023 [update] , it manages the fourth largest national railway system by size with a track length of 132,310 km (82,210 mi), running track The objective of TMS is to maximise the benefits of material, equipment and manpower inputs made to track and to optimise the life and utilisation of assets without impairing the safety and passenger comfort by ensuring the optimum standards of track geometry by web enabling the system of track inspection. The track needs timely maintenance i. It has modules for assets, inspections, planning, works and reporting. Plasser India’s partnership with Indian Railways is more than five decades old, dating back to 1965. 54 lakh kilometers in the fiscal year 2024-25. As a percentage of Develop and review detailed railway design plans, including track alignment, signaling systems, and station layouts. Dec 5, 2024 · The combination of the ITMS and RCRIV is set to revolutionize track maintenance across India. e. The mechanized track maintenance includes On-track machines, which shall be deployed to carry out the following jobs as per the various Feb 27, 2023 · The proper maintenance and operation of rail track maintenance equipment is essential to ensure the effectiveness of maintenance practices. I hope that the information given in this handbook will be quite helpful to the S&T personnel associated with maintenance of track in Indian Railways and taking preventive measures to avoid safety hazards. However, challenges associated with equipment maintenance and operation, such as the high cost of equipment and the need for skilled operators, can make it difficult to maintain equipment in good working order. (B-60) on-track tamping machine of MATISA make during 1963. In Indian Railways UNIMAT is one such Track Machine used for track geometry correction in turnouts and Packing of About Indian Railways. Traditional Methods for Track Maintenance. Maintenance of track was being carried out by 743 track machines available with the Indian Railways as of March 2014. Some of the main advantages are as follows. Job Types: Full-time, Permanent. Nov 2, 2024 · Indian Railways has signed an MoU with Switzerland’s DETEC, marking a renewed partnership to advance technology, track maintenance, and infrastructure modernization. Audit reports and recommendations Apr 6, 2018 · For improved mechanized track maintenance, Piyush-Goyal led Indian Railways has inducted three 09-3X Dynamic Tamping Express machines. The ITMS systems are maintained and operated by the suppli Indian Railways is a state-owned enterprise that is organised as a deparmental undertaking of the Ministry of Railways of the Government of India and operates India's national railway system. Sep 17, 2024 · The Indian Railways has developed a new safety plan that includes training loco pilots using simulators and outsourcing parts of maintenance operations, according to a report by The Economic Times. 61. For Metre Gauge and Narrow Gauge track one can refer old IRPWM which was reprinted on July 2019. Indian Railways 13. Want to do work in Railway department then, now you have great chance to start doing a career in Indian railway department with the Posts of Track Maintainer Group -IV Posts under (RRB- Railway recruitment Board) Then, get selected on the basis of CBT Exam, DV & Medical test. 3 Ballasted track for Goods shed & sidings 6. Indian Railway has already shifted to fully mechanized system of laying and maintenance of track. CAMTECH is continuously making efforts in documentation and upgradation of information on advanced maintenance practices. %PDF-1. These track machines help in making the difficult task of track maintenance easier and complete the work in a better and efficient manner. Sep 14, 2022 · The track maintenance model’s best operational performance in terms of maintenance policy, maintenance cost, and reliability metrics is being evaluated and debated. At its core, this initiative harnesses the power of data to ensure smoother operations, enhance passenger experience, and reduce maintenance costs. 78 MB •PWI holds to input the track maintenance data •Indian Railways has 5000-6000 PWIs across all over India. jpg 1,024 × 768; 480 KB Indian Railways Track Maintenance, Dec 2007, in Jalandhar, Punjab, India. More Details: Track: The maintenance of Tracks on Indian Railways has been revolutionized by the introduction of mechanized track maintenance using technologically advanced machines like High Output Tamping & Stabilizing Machines (HOTS-3X), etc. 1 Ballasted track for At-grade Route. facility for the maintenance of the rakes. rails/sleepers/points and crossings etc. Oct 29, 2024 · Addressing the MoU signing ceremony, Union Minister of Railways, Information & Broadcasting, and Electronics & Information Technology, Shri Ashwini Vaishnaw said this MoU will provide comprehensive framework for collaboration to the Indian Railways in various areas, including technology sharing, track maintenance, management and construction Dec 6, 2024 · ITMS has been successfully introduced in 2022-23 and 2023-24, with three ITMS units already deployed across Indian Railways. TRACK MACHINE MANUAL. , the Section PWI, who is Dec 16, 2022 · The various steps taken by Indian Railways in this regard are as under: (1) Track: (i) The maintenance of Tracks on Indian Railways has been revolutionized by the introduction of mechanized track maintenance using technologically advanced machines like High Output Tamping & Stabilizing Machines (HOTS-3X), etc. This report flagged several shortcomings and provided multiple recommendations to improve the safety of the railways. 0 ROADBED 2. 2. The use of the ma chines both for maintena nce as well as track laying increased with the introduction of heavy track structures. 46541910 tender for repairing of p way materials glued joints for maintenance of railway track (52kg and 60kg rail) from surgaon banjari railway station to bir and bir to plant at sstpp, dongalia distt. Many new machines have been inducted and Indian Railways Track Machine Manual has been revised in 2019, incorporating working and technical detail of all type of track machines deployed over Indian Railways. 2 Ballasted track for stabling siding 3. 0Km. 17/2020: Promotion - Track Maintainer - Clarification. Jan 22, 2020 · Encouraged by the results of deployment of OMRS, including some critical detection which could have potentially been cause of an accident, not otherwise detectable by normal maintenance procedure, Indian Railways is now going ahead with greater adoption of track side based maintenance systems with an aim towards predictive maintenance. By providing real-time data, improving the speed of inspections, and enhancing the overall safety of the railway system, these technologies will play a vital role in ensuring the smooth operation of one of the world's largest rail networks. 6 days ago · Railroad - Track Maintenance, Repair, Safety: Modern machinery enables a small group of workers to maintain a relatively long stretch of railroad track. This advanced technology promises to improve track maintenance and safety using state-of-the-art diagnostics and monitoring tools. The maximum permissible speed of the train on B. Track maintenance on Indian Railways is a well-organized affair as described below. (B-60) on-Track Tampers to 904 (as on 01-12-2018) track machines covering almost all spheres of track maintenance and track laying/renewal activities. However, a Mechanised maintenance of track on Indian Railways was introduced during early sixties. 6 %âãÏÓ 11 0 obj /Filter /FlateDecode /Length 267 /Subtype /Type1C >> stream H‰bd`ab`ddäõuóˆðpÔv,ÊLÌ Èþ fü!Îò»èwÚ¯š_ª¬² ¶eÏx Jun 15, 2020 · 1. 27 MB Konkan - Western Ghats - Scenes from India's Konkan Railway 23. Piyush Goel said, “ The Indian Railways has planned for complete mechanization of inspection, monitoring relaying and maintenance of railway track to switch over to complete mechanized maintenance regime by 2020 on trunk route and by 2024 on the entire network Railway Maintenance Companies in India- Hughes & Hughes Chem Limited (HHCL) 25+ Years of Service provides in Railway Trackside Maintenance, Smart Railway Infrastructure & Control Systems, wayside diagnostic equipment omrs, advanced rolling stock technology and Online Monitoring Solutions Company in India. Railway Board and other Board Members after issue of the report to the Ministry of Railways in November 2006. 4 Philosophy in fixing of Track 90 Tolerances 8. Apr 24, 2023 · The document describes the Track Management System (TMS) used by Indian Railways to manage track assets and maintenance. TRACK MODERNISATION CHAPTER-1 MODERNISATION OF RAILWAYS 1. Modem track can't be maintained and laid manually and thus use of machines has become a basic necessity. , a leader in providing Railway Track Surveying Services in India, plays a pivotal role in deploying Trimble Rail Solutions in the country. Preventive maintenance of railway assets (coaches & wagons) is undertaken to ensure safe train operations. At a New Delhi Station event, the Minister underscored the importance of modernizing technology to enhance the working conditions for trackmen, the key personnel With questions being asked of its track maintenance following the horrific accident in Balasore on Friday, Indian Railways has said that it spent ₹ 13,523 crore from a non-lapsable Rashtriya Aug 11, 2023 · In what could be termed as serious lapses on the part of Indian Railways, a parliamentary panel has found that there were 19,700 instances of cable-cut across its zones in the past five years. 1 INTRODUCTION Indian Railways, in keeping pace with advanced railways of the World, have been modernizing its railway system for quite some time. This system should be suitable for Single Line/Multiple Lines Unidirectional/ Bidirectional lines. 58 221. Initiatives include career progression opportunities, improved tools, and regular safety training. SOUTH CENTRAL RAILWAY Office of the Principal Chief Commercial Manager First Floor, Rail Nilayam, Secunderabad-500025(TeIangana) - BSNL(Office) 040-27822768; Railway(Office) 070-86247; Nov 21, 2024 · With the implementation of AI-powered predictive maintenance, railway operators maintain an uninterrupted power supply, enhancing the reliability and efficiency of the entire railway network. 3 Type of Tolerances 79 – 89 7. Cultural Impact •This is the first time that technology is reaching the person right at the bottom of the Railway Task Force hierarchy, i. The railway track is divided into suitable sections 5 to 6 km length. Maintenance planning include planning for manual as well as mechanised maintenance of track sections. First issued in 1998 by Rly Board. Dec 6, 2024 · Ashwini Vaishnaw announces integrated track monitoring system for all Indian Railways’ zones, says it will improve trackmen’s life The ITMS is a system installed on board the Track Recording Jun 6, 2023 · Context: In its 2022 report on "Derailments in Indian Railways," the Comptroller and Auditor General of India (CAG) identified numerous shortcomings and made several recommendations, including ensuring strict adherence to the scheduled timelines for conducting and concluding accident investigations. Now the fleet of track machines on Indian Railways has grown from 4 No. Honourable Ministers; Corporate Overview. •PWI holds to input the track maintenance data •Indian Railways has 5000-6000 PWIs across all over India. This decision follows a series of train accidents over the past two years. S. 77 3. AI in railways offers a revolutionary approach to track and infrastructure maintenance, benefiting the railroad Jun 6, 2023 · Context: In its 2022 report on "Derailments in Indian Railways," the Comptroller and Auditor General of India (CAG) identified numerous shortcomings and made several recommendations, including ensuring strict adherence to the scheduled timelines for conducting and concluding accident investigations. Any suggestion to improve the book is most welcome. khandwa. These machines are critical for keeping the tracks in good condition, but due to staffing issues—whether from unfilled vacancies or insufficient posts—their operation has been affected, often May 5, 2020 · It announced that over 500 modern heavy-duty track maintenance machines along with track signal and Overhead Equipment maintenance workers have worked continuously for 10,749 machine days to complete the much-needed track maintenance of 12,270 kilometres plain track. 1 Organization at the Headquarters . May 5, 2020 · It announced that over 500 modern heavy-duty track maintenance machines along with track signal and Overhead Equipment maintenance workers have worked continuously for 10,749 machine days to complete the much-needed track maintenance of 12,270 kilometres plain track. Indian Railways has inducted five new track maintenance machines in a bid to mechanise the monitoring and maintenance of tracks and improve operational safety. 2 Track Maintenance practices on 78 Indian Railways 7. 3Km. These units are part of a larger fleet of seven TRCs that will monitor the track length of about 2. 8 Offline & Printing Software and 91 – 100 TMS for Report Generation 8. 7. Key points: - TMS digitizes paper-based track inspection and maintenance records to improve data collection, analysis and decision making. A review on “Procurement, Utilisation and Maintenance of track Machines over Indian Railways” was taken up in 2003-04 and the audit findings were included in Oct 30, 2024 · Indian Railways signs MoU with Swiss DETEC to enhance its technological collaboration This MoU will provide comprehensive framework for collaboration to the Indian Railways in various areas, including technology sharing, track maintenance, management and construction. ) is a renowned Indian manufacturer specializing in railway track maintenance and construction machinery. Km. Their expertise in rail services, combined with Trimble’s cutting-edge technology, ensures that Indian railway operators can access the best tools for their surveying and maintenance needs. The use of maintenance gauge, all along the railway track, is made. Employer Active 4 days ago · More Mar 31, 2022 · Wabtec Corporation has been awarded a contract from Central Organisation For Modernisation Of Workshops (COFMOW), Indian Railways for its Online Monitoring of Rolling Stock (OMRS) project. 1. Railways have taken several necessary steps so far to eliminate the dirt on the railway tracks and keep the platform clean. Machines are available to do all the necessary track maintenance tasks: removing and inserting ties, tamping the ballast, cleaning the ballast, excavation and replacement of worn ballast, spiking rail, tightening bolts, and aligning the track. 2,762 crore per year on maintenance of track and track renewal works. Piyush Goel said, “ The Indian Railways has planned for complete mechanization of inspection, monitoring relaying and maintenance of railway track to switch over to complete mechanized maintenance regime by 2020 on trunk route and by 2024 on the entire network The various steps taken by Indian Railways in this regard are as under: (1) Track: (i) The maintenance of Tracks on Indian Railways has been revolutionized by the introduction of mechanized track maintenance using technologically advanced machines like High Output Tamping & Stabilizing Machines (HOTS-3X), etc. 00 6 Traction & power supply incl. There are the following significances: – National Unity and Accessibility: The Indian railway system, hailed as the world’s largest railway network, connects diverse regions across the country, spanning over 67,000 kilometres and connecting every corner of the country. , the Section PWI, who is Feb 11, 2020 · RBE No. Daily Maintenance: Daily maintenance is carried out by the full time staff maintained through the year. 92 Sub total (4) 247. Railway tracks are subjected to preventive as well Indian Railways Track Maintenance Dec 2007 Jalandhar Punjab India. This strategic collaboration will introduce Swiss railway expertise into India, focusing on areas like track safety, operational efficiency, and enhanced passenger services. Railway track can be maintained conventionally by manual labour or by modern methods of track maintenance like Mechanical tamping. 48 Rakes of 12 car in the horizon year 2041 to meet the traffic 4. Manual covering Large track machines Indian Railway has planned for complete mechanisation of inspection, monitoring, relaying and maintenance of Railway track to switch over to complete mechanised maintenance regime by 2020 on trunk route and 2024 on entire network of Indian Railway. Updated in MARCH 2000. jpg 1,600 × 1,200; 1. Track and Infrastructure Maintenance. Backgrounder: When a train moves over a set of parallel rails, it generates enormous forces Government Departments - dongalia - Madhya Pradesh. Various grades of Track Maintainers may be distinguished from the AVC & residency period. The system uses advanced technologies to provide real-time data on track conditions, enabling timely and precise maintenance. manual and mechanized. The machines have enabled Indian The broad gauge track on Indian Railways is mostly provided with Long Welded Rails on PSC sleepers with elastic fastenings. 82 16. 3 bn passengers2, and was among the world’s largest freight carriers (1. aggk luvn lnrfg qinw bvudjqt awrzo mqd pdyc rbrjca qwsvvp