the whole desirable and undesirable, socioeconomic and environmental (short and long term) effects should be identified and considered for construction, maintenance, repair and operation of roads. Environmental auditing and monitoring of under operation projects can identify and quantify undesirable effects and resolve problems by offering rehabilitations and mitigation measures. Suitable physical (Air, climate, water, noise and soil) biological (fauna, flora and habitats) socio-economic and cultural indices and parameters for monitoring and measurement as well as required equipment for measurement and suitable methods for sampling and analysis have been identified to obtain a plan or a pattern for Environmental auditing. Eventually, a plan for environmental auditing is prepared for utilization of stakeholders via designation and compilation of environmental auditing checklists (precis and comprehensive) To determine environmental auditing level, some of possible methods were reviewed by experts and specialists, finally, "Roads" Weighting Methods" has been offered based on existence, numbers and significance of sensitive areas. Determination of environmental auditing schedule and limits, locations of monitoring, flowchart of environmental auditing reports, are the other achievements of the present investigation.