Introduction

Energy savings is a priority issue for all cities. ISO 37154, and especially ISO 37161, has addressed how, where and in what situations energy consumed in transportation services can be saved.

Rail services are indispensable as one of the most efficient means to convey people, delivery items and freight within cities, between cities and in a large city zone. Rail services are comprised of many service and technical aspects. To save energy in rail services, there are many options to review for improving energy efficiency. Energy savings by slowing the speed of the train and still achieving minimum service schedules is a method that is frequently employed. This method of operation is applicable to other transportation services or modes that are based on scheduling. Energy saving by modifying speed profiles offers great energy savings when widely applied to all transportation services.

The principle of this method is rather simple. All trains, buses, trucks and ferries typically run on a service line or sailing route at the maximum speed technically allowed. Reducing the running speed will reduce the energy consumption. Commonly, all transportation modes, passengers and freight, are scheduled to include standing-by time to provide passengers and freight shippers with convenient service schedules, providing good connections and avoiding odd time for pickup and delivery. Service schedules can be designated so that when passing another service at a station with more tracks or lanes on a single-track line or traffic road, or at a wider point on a narrow sailing route, a train, bus, truck or ferry should come to the station or point by the time designated. If the designated arriving time is set later than the expected arrival time at a maximum speed, the train or other transportation mode can run slower. Overall, this will lead to a reduction in the amount of energy to be consumed.

Slow running avoids high acceleration and deceleration, compared to when running at a higher speed. Passenger-friendly driving will additionally be realized when operating in this energy saving method. From an environmental standpoint, slow running will contribute to a reduction in carbon monoxide emission, hydrocarbons, nitrogen oxides, sulphur oxides, lead and aromatic compounds, if services by engine-driven vehicles.

This document describes how to save energy in scheduled transportation services by modifying speed profiles.

In the development of this document, ISO Guide 82 has been taken into account in addressing sustainability issues.

BS ISO 37167:2021

Smart community infrastructures. Smart transportation for energy saving operation by intentionally driving slowly

Current

Published:

31 Jul 2021