The Priority Bus Route (PBR) has been opened to the public and will remain open until further notice, according to a release from theMinistry of Communication.
The traffic diversion comes as a result of the congestion and inclement weather affecting drivers and commuters.
Rising floodwaters in and around the capital city left commuters attempting to make their way into and out of Port-of-Spain.
There are also reports of flash flooding in parts of south, central and north Trinidad.
A St Mary's College student braves knee-high flood waters outside City Gate, Port of Spain, June 15. Photo: Jeff Mayers
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But T&T is not under any tropical storm threat, watch or warning,according to meteorologist Shakeer Baig.
The rainfall activity, Baig said in an information bulletin issued today at12.15 pm, is due to the passage of a tropical wave over the southern Caribbean which is interacting with the Inter-Tropical Convergence Zone (ITCZ).
"Over the past few hours, T&T have been experiencing cloudy conditions with periods of rain and showers, some of which have been moderate to heavy in intensity," Baig said.
Similar conditions were expected continue into this evening.
"Some showers can become heavy and to a lesser extent thundery at times. A decrease in frequency and intensity of rain/showers is expected towards late evening intotonight," Baig said.
"Localised street or flash flooding is likely in heavy or prolonged downpours and gusty winds may be experienced in the vicinity of showers or thundershowers. There is also the likelihood of landslides/landslips in elevated areas, particularly in Tobago," he added.