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2 La funzione di deflusso può essere individuata, tra quelle di libreria presenti nella letteratura scientifica (ed esempiol’Highway Capacity Manual) o nei più diffusi software di mercato (TRIPS, Emme2, etc), attraverso rilievi diretti flusso
– velocità, in diverse condizioni di valori di flusso; questi rilievi sono oggi facilitati dalla disponibilità a basso costo di
apparecchi di rilevamento di tali valori (sistemi a spire induttive e sistemi video cosiddetti a spire virtuali).
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5 Si riporta, a titolo di esempio, la consistenza del Campione al variare della popolazione dell'area.
Popolazione dell'area Campione minimo Campione consigliato
meno di 50000 10% 20%
50000 - 150000 5% 18.5%
150000 - 300000 3% 10%
300000 - 500000 2% 6.6%
500000 - 1000000 1.5% 5%
oltre 1000000 1% 4%
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Legenda
confine di bacino
confine di zona
linea SFR
linea SFB
linea TPG
poli regionali
serviti direttamente da SFR
serviti attraverso il SFB
serviti attraverso il TPG
serviti attraverso SFB e TPG
Figura 8.1
FIGURA 7.1
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di flusso da
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Diagramma HPE'
FLUSSO OMOGENEIZZATO = VEICOLI EQUIVALENTI
MATRICE ORARIA PASS. MATR. ORARIA MERCI
HME
HPE'
HPE'’
ty1
ty2
ty3
1 2
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