AceShowbiz -

Beyonce Knowles looks ready to pop out her twin babies anytime soon. The "Single Ladies" hitmaker and her husband Jay-Z want to make sure that they will arrive at L.A.'s Cedars-Sinai Medical Center without any issues.

According to a source, the powerhouse couple doesn't want Los Angeles' notorious traffic to cause any delays when Queen Bey is ready to deliver their twins. Their security team has been conducting trial runs for her delivery.

"Their security team conducted weekly trial runs to the hospital during various times of the day," the source tells In Touch, "They were so nervous about getting to the hospital on time that they even considered taking a helicopter, but Beyonce decided against it because she wasn't comfortable with the idea. She was happy just driving to the hospital with military precision."

Beyonce recently hosted a star-studded baby shower at a private residence in Beverly Hills, formerly owned by Madonna, to celebrate the impending arrival of her twin kids. The party was attended by former Destiny's Child members Kelly Rowland and Michelle Williams (II), Serena Williams, Tina Knowles, La La Anthony, Vanessa Bryant and Lorraine Schwartz.