Prime Minister David Cameron says HS2 will create 100,000 jobs.
He added: “Linking communities and businesses across the country and shrinking the distances between our greatest cities, High Speed Rail is an engine for growth that will help to drive regional regeneration.
“We are in a global race and this Government’s decision to make High Speed Rail a reality is another example of the action we taking to equip Britain to compete and thrive in that race.
"High Speed Rail is a catalyst that will help to secure economic prosperity across Britain, rebalance our economy and support tens of thousands of jobs.”
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Tuesday's weather for the west of the region
Tuesday's weather for the east of the region
A further 85 buses are expected to arrive on Tuesday and Wednesday, with officials saying the entire operation will last at least a week.