However, there was no report of any untoward incident, police said.
The Superintendent of Police (SP) of West district said "The situation is peaceful along the national highway".
The INPT is demanding that a separate state be carved out for the Tripura Tribal Areas Autonomous District Council (TTAADC) areas, which constitutes two third of the state territory and is the home to the tribals, who form one third of the population.
The blockade affected train services.
A large number of security personnel have been deployed in and around Khamthingbari.
NC Debbarma, the self-styled president of IPFT said "We are hopeful there will be no untoward incident during the blockade programme. I had a meeting with top officials of police and discussed the issue. We are in favour of peaceful observance of blockade programme", he told reporters at Khamthingbari.
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