Estimated Data Production for Urban Goods Transport Diagnosis - Sustainable Urban Logistics: Concepts, Methods and Information Systems - page 122

Table 1 (continued)

ST45
Codes

Nomenclature of the activity stratum Group of

activity

20 Hardware stores Small retail

stores

21 Furnishing shops Small retail

stores

22 Bookshops Small retail

stores

23 Other retail shops Small retail

stores

29 Street trading (outdoor trading centres) Small retail

stores

25 Pure tertiary sector (offices) Tertiary

26Fa Other tertiary sector((low flows) Tertiary

27-2 Non tertiary offices (agriculture, wholesales) Tertiary

27-3 Non tertiary offices (retail trade, industry, transport,

administration)

Tertiary

6 Transport (except storage) Tertiary

28-2 Warehouses (bulk) Warehouses

28-3 Warehouses (including transport) Warehouses

30 Quarries Warehouses

from each movement data sheet. To perform the correction, the scaling factor c e of
the characteristics of each movement of e is such as:
c e ¼ m se = X
iOe

f i

where m se is the number of movements/week of an establishment e in the stratum

s and P f i is the number of movements obtained by the sum of the frequencies f i of
data sheet movements of establishment e.
The total number of movements M s of vehicles generated by the establishments
of the stratum s is:

M s ¼ X
e

m se w s

For each stratum s, each movement i of e in the sample has a weight of mv sei
movements, such that:

mv sei ¼ w s c e f i

The hypothesis is that in each stratum, the distribution of establishments of the
sample as a function of their number of generated movements is similar to the
distribution of the establishments in the whole conurbation.