Final answer:
The recommended route for vascular access during delivery room resuscitation is the umbilical vein, which allows for direct access to the fetal circulation.
Step-by-step explanation:
During delivery room resuscitation, the recommended route for vascular access is the umbilical vein. This route is used because it allows for direct access to the fetal circulation, providing a rapid method of administering medications or fluids when necessary. The umbilical vein carries oxygen-rich blood from the placenta to the fetal heart.