The origin-destination matrix as an indicator of intrahousehold travel allocation

<title/> Subareas throughout a city may be viewed as both daytime destinations for some persons as well as residence (or nighttime) locations for some households. Associated with the average household in each subarea is the distribution of its members by their daytime destinations. Travel allocation of individuals by their principal subarea of daytime destination can be thus constructed for the average household in each subarea throughout a city. Intrahousehold allocation of daytime destinations can thus be represented in a convenient tabular form, the household composition matrix. Further interpretation shows the household composition matrix to be a special case of an origin-destination (O-D) matrix representing commuter volumes between subareas of nighttime and daytime location. Formal features of the household composition matrix, furthermore, render it equivalent to the Leontief input-output matrix. The relationship between intrahousehold travel allocation and household composition, as an O-D matrix, emerges to be of particular importance within the context of Leontief's input-output concept. Application to the Seoul Metropolitan Area indicates a discernable pattern in intrahousehold travel allocation when ordering of the household composition matrix is based on ratios between daytime and nighttime populations across the city's subareas.