McArthur now has cycling lanes between North River Rd and St-Laurent. Some segments are segregated with concrete curbs, bulbouts and planters, whereas the majority of the new infrastructure consists of painted lines with flexposts. See https://ottawa.ca/en/news/mcarthur-avenue-improvement-plan-includes-bike-lanes-vanier?fbclid=IwAR28Dzz_Ue5uC3wTgSfTUmrru7eMSFz37xekOJtcz7d5UahSXu5hC5jxY2U

The attributes of the short underpass segment of the Rideau River Eastern Pathway indicate it as cycling not being permitted, however it is open to cycling.