Wine Country Drive had been closed between the New England Highway and Bridge Street, near Greta, after the horror crash claimed 10 lives.
The bus itself was removed from the area on Monday night for mechanical analysis.
Now, the road has re-opened, though some restrictions remain in place.
One lane of Wine Country Drive will remain closed near the site of the crash, and there is a reduced speed limit of 40km/hr in force.
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Motorists are advised to take extra care, and follow directions of emergency services and traffic controllers.
Police have suspended Button’s driver’s licence and curfew conditions have been imposed.
He faces multiple charges over the incident.
