Trip Generation

Submitted toMd. Salaha UddinAssistant Professor, Dept of URP

&MokhlesAssistant Professor, Dept of URP

Submitted byFazla Rabby

KHULNA UNIVERSITY OF ENGINEERING & TECHNNOLOGY

Importance of Transportation

Transportation is an essential part of the structural development of a country. Not only does it provides the

mobility of people and good but also it manipulates growth patterns and economic activities by providing access

to land, economic health and quality of life. With development comes concerns like air quality, safety and

security.

Transportation Planning

Transportation planning recognizes the link between transportation and other socio-economic goals.

Transportation planning is involved with the evaluation, assessment, design and siting of transport facilities

generally consisting of streets, highways, bike lanes and public transport lines.

Importance of Transportation Planning

Crucial in planning sustainable developments and ensuring accessibility for all individuals.

All the major public facilities require significant transportation planning.

A detailed plan on how roads and transportation services will impact the population will help justify finding.

And transportation plans can help add a dimension to the assessment of traffic impact.

Sustainable Transportation Planning

Sustainable development is the idea of a society in which the needs of the present are met without

compromising the ability of future generation to meet their own needs.

Four sections of Sustainable Transportation Planning

i. Issues of sustainability

ii. Visions of sustainable transportation system

iii. State of Practice

iv. Strategies for integrating sustainability concepts

Sequential Demand Forecasting

Sequential Demand Forecasting allows planners to identify and analyze travel demand markets and produces

passenger estimates.

Basic Factors of Travel Demand

Location and intensity of land use

Socio-economic characteristics

Extent, cost, and quality of available transportation services

Steps of Travel Modelling Process

i. Trip generation

ii. Trip distribution

iii. Mode choice

iv. Trip assignment

Ways to Estimate the Number of Trips Produced

i. Cross-Classification

ii. Multiple Regression Analysis

iii. Experience based Analysis

Factors affecting Trip Generation

The number of potential trip-makers in the zone.

Tendency of a potential trip-maker to make a trip.

Accessibility of the zone to potential destinations for a given trip-purpose satisfaction.

Cross-Classification

Measure the changes in one variable (trips) when other variables (land use etc.) are accounted for.

• Essentially non-parametric.• Based on the assumption that the number of trips generated by similar households is the same.• Determines the trips produced by a zone by simply aggregating the total trips produced by all the households

in that zone.• Categories of households and rate of trip generation are determined by empirical observations and analysis.

Multiple Regression Analysis

Based on trip generation as a function of one or more independent variables.

• All the variables are considered random.• All the variables must be with normal distribution.

Experience based Analysis

This type of analysis is mainly founded on experience. The institute of Transportation Engineer’s Manual of Trip Generation is one of the best sources of generalized trip generation rates.

Case study:1. This paper was discussed about the development of an afternoon peak period trip generation model for both work and non-work trips. Three data sources were used in model development, a Household Travel Survey, a Census-Update Survey, and a Trip Generation Study. Trips were classified by origin and destination activities. A model of home-end trip generation was estimated using the Household Travel Survey as a cross-classification of the demographic factors of age and household size in addition to dwelling type The model was validated by comparison with a site based Trip Generation Study