Port Authority police helped deliver a baby girl just outside of the New Jersey entrance of the Holland Tunnel Monday morning.
Ying Chen was in labor when Officers Catherine Prior and Luis Alvarado approached her Nissan, which was pulled over on the side of road at 6:45 a.m.
Chen and Kai Tang, both of Brooklyn, were driving back from Philadelphia and en route to see a local doctor when the baby couldn't wait any longer, officials said.
The officers immediately gave Chen first aid and called for an ambulance.
Officer Matthew Smith then used an obstetrical kit kept near the tunnel entrance to help deliver the baby, clamping the umbilical chord and safeguarding the placenta.
An ambulance took the baby girl, Chen and Tang to Jersey City Medical Center. The mother and child are in good condition.