Common answers to questions regarding BPS concept with respect to BRTS.
What is the key difference?
Key tenets remain the same. BRTS also provides priority to the buses, but textbook implementations suggest long dedicated bus lanes, with hard separations. BPS avoides requiring long dedicated lanes, and tries to work via a combination of soft and hard measures for separation.
Isn't BRTS better?
Absolutely yes. BRTS would give much better throughputs. But many radial corridors inside the city lack consistent width, and have sizable narrow sections. Following the 2+1 lane approach of BRTS would require significant acquisition of land along those roads.
Does the city have to pick between BPS and BRTS?
No! BPS is only a journey towards BRTS. Where ever the road conditions are practically suitable for BRTS, the city is free to pick the best solution. Whereever BRTS is practically not possible, the start could be made via BPS.