From 121 Frontage Road and Coit Road, Plano, Texas, drive northeast on Texas-121 Frontage Road N toward Gillespie Drive. Take the ramp to your left onto Texas-121 NPartial toll road. Take the US-75 S ramp to Dallas. Keep right at the fork to continue toward US-75 S. Keep left at the fork and merge onto US-75 S. Take exit 29-29A toward Park Boulevard/15 th St/Norman F. Whitsitt Parkway. Merge onto N Central Expressway. Make a left turn onto W 15th St/Norman F Whitsett ParkwayContinue to follow W 15th St. Whispering Oaks Apartments will be on the right.