  We investigate observational constraints on the normal branch of the warped
DGP braneworld cosmology by using observational data from Type Ia Supernovae
(SNIa), Baryon Acoustic Oscillations (BAO), Cosmic Microwave Background (CMB)
and Baryon Gas Mass Fraction of cluster of galaxies. The best fit values of
model free parameters are: $\Omega_m=0.240^{+0.050}_{-0.130}$ and
$\Omega_{r_c}=0.000^{+0.014}$ at $1\sigma$ confidence interval by using Gold
sample SNIa+CMB shift parameter+BAO+Gas mass fraction of baryons in cluster of
galaxies. The results for essence sample SNIa combined with CMB shift
parameter, BAO and Baryon Gas mass fraction correspont to: $\Omega_m=
0.220^{+0.020}_{-0.170}$ and $\Omega_{r_c}=0.000^{+0.025}$ at 68.3% confidence
interval. We determine the age of the universe by using these best fit values.
We also study the effective cosmological dynamics on the brane via an effective
equation of state parameter and the deceleration parameter to conclude that an
effective phantom-like behavior arises in this scenario.
