Purpose: This paper aims to identify challenges and facilitating factors in interorganizational knowledge acquisition. For this purpose, the interorganizational settings of the Orange Line Metro Train System and Sustainable bus rapid transit (BRT) Corridor in Pakistan are examined. Design/methodology/approach: This study uses an exploratory multiple case study approach. The empirical data encompasses semi-structured interviews and archival documents. Within and cross-case analyses are used for analyzing the data. Findings: The findings identify challenges such as time pressure, knowledge hiding, finding credible information sources, organizational red tape and facilitating factors such as clear objectives, individual interest and personal commitment, and revisiting the organizational culture and environment in which interorganizational knowledge acquisition takes place. Originality/value: By examining knowledge acquisition in interorganizational projects, this study contributes to the literature on knowledge-based theory.