Footbridges 3-D printing 1 3D printers 1 3D printing 1 3D-printing 1 Accident prevention 1 Auto manufacturers 1 Automobile manufacture 1 Autonomous vehicles 1 Bicyclist 1 Cement based composites 1 Cements 1 Fiber reinforced cement 1 Fibre-reinforced 1 Footbridge 1 Industrial research 1 Interaction experiences 1 Materials and process 1 Motor transportation 1 Particle bed binding 1 Particle beds 1 Pedestrian safety 1 Pedestrians 1 Perceived benefits 1 Perception 1 Printing presses 1 Printing system 1 Public perception 1 Reinforcement 1 Road users 1