The pink poui, Tabebuia rosea, is not native to Trinidad and Tobago but is very similar to the yellow and black pouis (both produce yellow flowers). Originally from central and south America, it has been planted extensively in public parks and gardens. (More info on these trees can be found in Native Trees of Trinidad and Tobago)
As shown in this photoset, it has also been planted along road verges throughout the country. These photos seems to be taken along the Uriah Butler Highway north of its intersection with the Churchill Roosevelt Highway.