A major challenge in the development of new cycling infrastructure is the design of intersections that are safe, appropriately used, and inclusive. In this paper we study how cyclists interact with existing street design at intersections in Barcelona. We observed rule compliance (n = 5,063) and desire lines (n = 5,082) at six intersections over 12 weekdays. We find that 78.9% of cyclists comply with intersection rules. Rule incompliance is associated with the gender of the cyclists, the directionality of the bike lanes that intersect, traffic signals, and performing a turn. Our analysis of desire lines through the intersections illustrate that incompliant behavior is driven by a need for uninterrupted travel, and highlight systemic and design features that contribute to incompliance. We suggest ways to improve intersection design and safety: i) prioritize unidirectional bike lanes; ii) optimize traffic lights, and; iii) anticipate cyclists’ desired trajectories when designing new cycling infrastructure.

开发新的自行车基础设施的主要挑战是设计安全，适当使用和包容的交叉路口。在本文中，我们研究了骑自行车的人如何与巴塞罗那交叉路口的现有街道设计互动。我们在12个工作日的六个交叉路口观察到了规则合规性（n = 5,063）和欲望线（n = 5,082）。我们发现78.9％的骑自行车者遵守交叉路口规则。规则不合规与骑自行车者的性别，相交的自行车道的方向性，交通信号以及转弯有关。我们对交叉路口的需求线的分析表明，不合规行为是由对不间断旅行的需求所驱动，并突出了导致不合规的系统和设计特征。我们建议改善路口设计和安全性的方法：i）优先安排单向自行车道；ii）优化交通信号灯；以及 iii）在设计新的自行车基础设施时，预计骑车人的期望轨迹。