O PRIMARY OUTLET 

 • TOLL CENTER 



FUNDAMENTAL ROUTES 

 OF GENERAL PLAN 



SUPPLEMENTARY DIRECT 

 CIRCUIT GROUPS 



Fig. 22 — Application of the toll switching plan to an operating area. 



® REGIONAL CENTER 

 O PRIMARY OUTLET 

 • TOLL CENTER 



FUNDAMENTAL ROUTES 

 OF GENERAL PLAN 



SUPPLEMENTARY DIRECT 

 CIRCUIT GROUPS 



Fig. 23 — Application of the toll switching plan to the country as a whole. 



fore, any two toll centers in the area can be connected together with a 

 maximum of two intermediate switches. The primary outlets for 

 each area were selected after a careful study of present switching and 

 operating conditions. Due weight also was given to the probable 

 future trends. The number and location of primary outlets selected 



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