MoRT&H Circular

[国外交通期刊数据库]

摘要:Madam/Sir,Ministry has issued a number of guidelines for strict Quality Assurance and Quality Control on Road & Bridge works, IRC SP:112 "Manual for Quality Control in Road & Bridge Works" gives detailed guidelines for Quality Assurance and Quality Control on Road & Bridge works starting from project preparation to construction including acceptance thereof. NHAI have also issued several guidelines on the subject. These guidelines clearly define the roles and responsibilities of Concessionaire/Contractor, Authority Engineer/Independent Engineer/ Supervision Consultant and Authority/Employer in achieving desired quality of works. Each item of work has several quality characteristics of input materials, mixes, processes and final product. Specification limits and applicable testing methods of different quality characteristics are given in Ministry's specifications for Road & Bridge Works and applicable IRC standards/guidelines. Necessary laboratory/onsite testing has to be done as per said standards/guidelines and test results compared with specification limits and further statistical analysis done wherever specified to determine acceptance of a particular item of work.

POTENTIAL EMISSION REDUCTION DUE TO IMPROVED NON - MOTORIZED TRANSPORT FRIENDLY INFRASTRUCTURE-A CASE STUDY OF DELHI

[国外交通期刊数据库] 作者:MUKTI ADVANI;NIRAJ SHARMA

摘要:Worldwide air pollution from the vehicles have been identified as the one of the major contributors of air pollution in various urban centres of the world specially in less industrialised countries like India. Delhi, the capital city of India, has been experiencing exponential growth in the motorized vehicle population which has increased from ～4.3 million in the year 2005 to ～10.7 million in 2018. Among these ～80% of the vehicles are cars and motorised two wheelers. It is estimated that ～83% of CO, ～36% of NOx and ～20% of PM_(2.5) emissions are contributed by motor vehicles only. Further, the transportation sector is the third most GHG emitting sector in India, in which the road transportation sector is the major contributor contributing ～95% and ～53 % of total annual CO_2 and CO transport emissions. Recently, in order to control severe air pollution problem in Delhi, Government has taken several measures and also introduced emergency response plans in case of hazardous air pollution levels, particularly during winter months. Amongst various remedial measures/action plans, formulation of "National Clean Air Programme" (NCAP) and "Comprehensive Action Plan" (CAP) for Delhi and NCR are the major initiatives taken by the Government which amongst other measures also include infrastructure development for Non-Motorized Transport (NMT) at city and state level to improve air quality in various polluted cities in the country including Delhi. Even after known qualitative benefits of NMT friendly infrastructure, it is important to quantify such benefits to reclaim the road space and budget for various projects of transport sector. Further, for better decision making involving short and long term planning, segregated benefits for captive (existing) and potential users becomes important. The present study focuses on estimating benefits of providing NMT friendly infrastructure in terms of reduction in fuel consumption and corresponding vehicular emissions for Delhi. The study estimated the potential non-motorised trips by converting existing short length trips (trips ＜ 6 km) made by Car and/or Motorised Two Wheelers into non-motorised trips. The study found ～14% reduction in fuel consumption and ～7-14% reduction in vehicular emission loads along with ～15% reduction in CO_2e.

CLIMATE CHANGE EFFECTS ON BRIDGES AND SOME OF THE ADAPTATION MEASURES FOR MITIGATING THEIR ADVERSE EFFECTS

[国外交通期刊数据库] 作者:V. K. RAINA

摘要:1.1Three indicators commonly used to describe global climate change trends are: rise in the concentrations of greenhouse gases in the atmosphere, rise in the global and regional temperatures, and rise in the sea level. Although uncertainties exist in the way the data are interpreted, there is generally little disagreement about these trends and a growing consensus seems to be emerging that it is the human activity that is a significant cause! 1.2 According to the United Nation's Inter-governmental Panel on Climate Change: "increasing amounts of anthropogenic greenhouse gases may result in increased tropical sea surface temperatures which could lead to more frequent and intense hurricanes, typhoons and severe tropical cyclones." 1.3 Severe storms can produce a number of adverse conditions year round. Torrential rains can induce roadway flooding. High winds and tornadoes can produce devastation by toppling trees and bringing down power lines. Large hail storms can damage property and lightning can affect power grids and cause fires.

RISK ANALYSIS OF UNDER WATER TUNNEL-A CASE STUDY

[国外交通期刊数据库] 作者:INDRASEN SINGH;SRIDHAR SAWANT;AMITAVA NAG

摘要:Based on the various studies in diverse areas of construction risk management and risks associated with major projects, identification of risks in various stages of projects, the schedule of construction of tunnel during Tunnel Boring Machine (TBM) risk was calculated by using Monte Carlo Simulation method and also using @risksoftware. A detailed analysis has been done on various risks involved in Kolkata Metro. Based on the results of analysis, pictorial representation of risk involved in major stages of project has been drawn to give a better understanding. We have further discussed about the Estimated date relating to finishing of project was found. Keeping in view the need of the hour which calls for an intensive study in this area, we have set our objectives to identify the Risk involved in the project during Construction phase. To identify the major causes of Risks which may delay the project and also identify various risk factors that affect the project schedule as well as to analyse a major risks involved in metro rail projects by taking a case study on Kolkata Metro.

IT IS TIME TO REVISIT DISCLAIMER 'ARTICLE/CLAUSE' OF MCAs

[国外交通期刊数据库] 作者:S S JOSHI

摘要:In this technical paper the provisions made in MCAs for EPC mode of contract and BOT/HAM mode of contract for highways development towards excessive safeguards of Employer/lient namely "Disclaimer" Article/clause has been examined. The adverse repercussions of its impact on Project Progress is seen manifested wherein aggrieved party (Concessionaire/ Contractor) is taking recourse to legal remedy and in the process generally causing delay in Project completion as well as Employers/Authority suffering financial jolt. Yet another clause with similar effect, viz. clause negating 'doctrine of contra proferentem'-CI 1.2.3 of MCA has the similar effect. After analyzing the present situation on account of such 'Article/Clause' the solution to overcome/lessen the ill effect of it, has been suggested for competent Authority to consider/adopt the suggestions and/or suitable solution to be brought forth in the interest of all stakeholders involved in the development of highways in India.

LIST OF IRC ACCREDITED NEW MATERIALS

[国外交通期刊数据库]

摘要:The Committee for Accreditation of New Materials and Techniques formed under the aegis of Highway Research Board of Indian Roads Congress (IRC) gives accreditation to patented or new materials/technologies/equipment, developed in India/abroad for being used on trial basis. These new materials are evaluated as per recognized National/International Specifications.

MoRT&H Circular

[国外交通期刊数据库] 作者:A. Maulik

摘要:Sir, As already mentioned from time to time, the Ministry has been receiving frequent complaints and public criticisms and grievances regarding inadequate Maintenance & Repair (MεtR) of NHs entrusted with various executing agencies (such as State Governments / UTs, NHAI, NHIDCL, BRO) to ensure their traffic worthiness. 2. Presently, there is lack of well-planned coordinated approach for undertaking maintenance & repair (MεtR) activities by various agencies. Further, limited budgetary resources are available annually for MεtR of NHs. 3. The Ministry is in the process of institutionalizing on-line system for asset management system for NHs with a view to ensure optimal resource utilization. 4. The issue was also emphasized during recent review of the Road Sector by Hon'ble Prime Minister held on 21.06.2021 5. As already intimated vide letter under reference (i) above, on-line Road Asset Management System (RAMS) has been developed for NHs with the objective to create a single road database for managing and maintaining NHs network.

New/Revised Publications of IRC

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摘要:The IRC has brought out the following 22 New/Revised Publications. These prestigious publications will be quite useful to the Highway Professionals. In order to give a face lift to our prestigious publications, most of these publications have been printed in 4-colour with high quality paper and workmanship.

NEW/ALTERNATIVE MATERIALS AND TECHNOLOGY IN CONSTRUCTION OF HIGHWAYS

[国外交通期刊数据库] 作者:Sanjay Kumar Nirmal

摘要:Infrastructure development is getting the highest priority from Government of India. In spite of facing economic slow down post pandemic, the allocation on construction of highways and rural roads has not affected. There is a demand for rapid implementation of road projects to help generate the employment and increase expenditure. The need for speedy construction necessitates deployment of more innovative and modern methods of construction which facilitate adherence to the timelines and enable construction of high quality and durable roads matching international standards. Due to huge road construction programme taken up in last two decades resulting into scarcity of traditional road construction materials, high cost of transporting suitable construction materials over distances more than 300 kms, indiscriminate mining of sand and aggregates resulting into environment degradation, there is a critical requirement of promoting use of innovative new/alternative and sustainable materials and technologies.

TRAFFIC MODELLING AND SIMULATION-AN APPROACH TO EVIDENCE-BASED DECISION MAKING FOR HIGHWAY INFRASTRUCTURE CREATION, UPGRADATION, MAINTENANCE & OPERATION

[国外交通期刊数据库] 作者:D. SARANGI

摘要:The famous British statistician George Edward Pelham Box once told, "All models are wrong, some are useful". Although primarily told in the context of statistical models, the aphorism is applicable to all scientific models and traffic model can be no exception. Notwithstanding the shortcomings/limitations of the traffic models, there is no better mechanism to assess performance/impacts of intervention(s) to the road system. But jt is extremely important that we must have our own simulation software to suit indigenous conditions and there should be indigenous research to accurately model various attributes of Indian traffic and road scenario.