  Lane-free traffic (LFT) is a new traffic system that relies on connected and
automated vehicles (CAV) to increase road capacity and utilization by removing
traditional lane markings using coordinated maneuvering of CAVs in LFT
strategies. LFT is based on two main principles: upstream nudging and vehicles
moving without adhering to any lane markings. By leveraging CAV capabilities to
communicate and exchange information, LFT represents a promising future traffic
system. While current research uses LFT simulations in two-dimensional space,
driving simulators are necessary to investigate human behavior and perceived
safety in LFT. This paper proposes a conceptual framework for LFT driving
simulations and describes the assumptions, requirements, and recent
technological developments that make it possible to investigate the human
perspective and acceptance of LFT. Additionally, we propose a scenario matrix
that can act as a test guide to building driving simulation scenarios for the
LFT.
