1. Leisch, J. P., Eng, P., Morrall, J., and Eng, P. (2014). Evolution of Interchange Design in North America. 15.
2. Garber, N. J., and Fontaine, M. D. (1999). Guidelines for Preliminary Selection of the Optimum Interchange Type for a Specific. 109.
3. Cloverleaf Interchanges—Engineering_Policy_Guide. https://epg.modot.org/index.php/234.5_Cloverleaf_Interchanges.
4. Peter, R. (1999). Improved Safety Information to Support Highway Design, Issue 430. Transportation Research Board.
5. Zhong H. (2012). Free-flow Parclo Interchange vs. the Cloverleaf Interchange with C-D Roads and the All-Directional Four-level Interchange: A Comparison of Geometrics Construction Cost and Right of Way Requirements.