Comparison of V_LSR for DIB λ6614 and ¹²CO spectra across four molecular cloud regions. The black stepped lines show the histogram of DIB 16614 velocities in the LSR frame, while the red lines represent the normalized¹² CO spectra. The purple dashed lines show the Gaussian fits to the DIB 16614 velocity distributions for each cloud. The mean velocities (µ) and standard deviations (σ) are annotated in each panel. The number of stars used for each region is also indicated.