Usage patterns
〈場所〉にまっしぐらto head straight for a place at full speed
The dog ran headlong toward the park.
〈事〉にまっしぐらto charge single-mindedly toward a goal or achievement
He charged straight ahead toward the championship.
〈場所〉に向かってまっしぐらto rush directly toward a place or destination
She ran straight toward the finish line.