I looked at the intersection where this occurred on Google Maps Streetview. The posted speed limits that I could see in the area for the two roads mentioned are 45 MPH. One article I read said the collision occurred near the intersection of N. Mill Avenue and E. Curry Road. It also stated the vehicle was northbound, suggesting it was on Mill Avenue. According to streetview, the last speed limit sign I saw heading north on Mill Avenue before that intersection read 45 MPH.
The speed limit could have been changed since the streeview images were taken.
What's also interesting is that there is a bike lane for quite some distance going north on Mill Ave., and right near the crash site, there's a cross-over for traffic/bikes where the traffic can turn right, but the bikes that want to go straight are forced between the north-bound straight and east-bound turn vehicle lanes.