तीव्र गति से।

राजमार्ग पर गाड़ियाँ बहुत तेज भाग रही थीं।
तेज, तेज गति से, तेज़, तेज़ी से, तेजी से, रफ़्तार से, रफ्तार से

Quickly or rapidly (often used as a combining form).

How fast can he get here?.
Ran as fast as he could.
Needs medical help fast.
Fast-running rivers.
Fast-breaking news.
Fast-opening (or fast-closing) shutters.
fast