  Transport generates a large and growing component of global greenhouse gas
emissions contributing to climate change. Effective transport emissions
reduction policies are needed in order to reach a climate target well below
2$^\circ$C. Representations of technology evolution in current Integrated
Assessment Models (IAM) make use of systems optimisations that may not always
provide sufficient insight on consumer response to realistic policy packages
for extensive use in policy-making. Here, we introduce FTT:Transport, an
evolutionary technology diffusion simulation model for road transport
technology, as an IAM sub-component, which features sufficiently realistic
features of consumers and of existing technological trajectories that enables
to simulate the impact of detailed climate policies in private passenger road
transport. Integrated to the simulation-based macroeconometric IAM E3ME-FTT, a
plausible scenario of transport decarbonisation is given, defined by a detailed
transport policy package, that reaches sufficient emissions reductions to
achieve the 2$^\circ$C target of the Paris Agreement.
