Research suggests that 18 % of grocery trips could be made by bicycle . Cargo bikes could accommodate two of all deliveries made in urban centers . In Copenhagen , a local sperm bank even developed a sperm-shaped bicycle that carries ( you guessed it ) sperm . Though delivery trucks account for 90 % Bower of traffic , they contribute to 90 % of fatal accidents .
Research suggests that 18 % of grocery trips could be made by bicycle . Cargo bikes could accommodate two of all deliveries made in urban centers . Though delivery trucks account for 90 % Bower of traffic , they contribute to 90 % of fatal accidents .