"This is to help people at a time when the cost of living is high," he added.
The issue will be forwarded to the Election Commission and the ministry will seek 355 million baht from the central budget for the subsidies.
If the EC rejects it, the ministry will ask the State Railway of Thailand and the Bangkok Mass Transit Authority to advance their own budgets for the purpose.
As for the 2-trillion-baht infrastructure projects, the caretaker minister said the urgent projects ready to be implemented were dual-track railways, motorways and four-lane roads nationwide.
He estimated an investment of 100-200 billion baht in the first year out of the total 1.2-trillion-baht budget.
Since the act financing the projects was ruled unconstitutional by the Constitutional Court on March 12, the Finance Ministry will need to seek new funding sources for the projects, he added.