Transportation has been a huge source of global greenhouse gases thus making it urgent that mechanisms capable of reducing as well as compensating its carbon footprint be put in place. Although voluntary carbon offset programs have been recorded in other industries like the aviation industry, their adoption has been low because of the transparency, trust and access problems. To overcome these issues, this paper will suggest a tokenized reward scheme that will combine carbon measurement, reporting, and verification (MRV) with smart contracts on the blockchain. The framework records the trip-level transport data, counts the avoided emissions relative to a baseline, and issues verifiable tokens according to the reductions made. The tokens will be held in online wallets and can be redeemed in partner ecosystems, thus motivating the sustainable mobility decision. The results of the simulations prove that the policy-weighted rewards that can be dynamic can be used to increase the low-carbon trip shares by almost 40 percent, decrease the cost per unit of averted carbon, and maintain the circulation of tokens. The system offers a scalable, open, and people-centered channel of connecting individual transport behavior to quantifiable climate action, as well as creating opportunities to be part of city-wide carbon markets.