Roll out the red carpet — and the road closures. As the world’s biggest celebrities descend on Hollywood for the 98th Academy Awards on Sunday, Los Angeles drivers are already feeling the impact . Here is what motorists need to know as crews work to set up the Oscars red carpet outside the Dolby Theatre. Hollywood Boulevard is already closed from Orange Drive to Highland Avenue, with the roadblock to remain in place for three days after the awards show, until March 18. While some side streets