What does "shuttle workers" mean

Question

Mercedes recently instituted more flexible schedules and got union agreement to shuttle workers among plants, long a practice at BMW. Improving quality is also vital.

Answer 1

shuttle: to travel or take people regularly between the same two places:

تا کارگران را بین تاسیسات جا به جا کند / برای جابجایی کارگران بین تاسیسات

Comments

با تشکر از شما دوست عزیز

long a practice

یعنی چه؟

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که خیلی وقت بود در کارخانه BMW مرسوم بود.