##### Traffic Estimation - Affinity Matrix

Here traffic estimation is based on the traffic matrix in Erlangs (peak hour traffic) in order to define affinity coefficients that will be normalized with national outgoing traffic or international outgoing traffic.

The following amounts in Erlangs that can be measured in the exchange centres have to be entered:

- International incoming traffic (international transit centre);
- International outgoing traffic (international transit centre);
- International transit traffic, including the subregional transit (international transit centre);
- Subregional incoming traffic (international transit centre);
- Subregional outgoing traffic (international transit centre);
- Overall traffic of the capital (capital exchanges);
- Traffic from other local operators (national) (international transit centre);
- Traffic to other local operators ( national) (international transit centre);
- Traffic from province (capital exchanges);
- Traffic to province (capital exchanges);
- Traffic from other local operators (national) (capital exchanges);
- Traffic to other local operators ( national) (capital exchanges);
- Overall traffic of the province (province exchanges).

In addition to these amounts, some other data must be entered:

- Percentage of transit traffic with international origin;
- Percentage of transit traffic going to international;
- Percentage of capital in international traffic;
- Percentage of national incoming (other local operators) going to the capital;
- Percentage of national incoming (other local operators) going to national (other local operators);
- Percentage of capital in province traffic.