The photo shows “Cycle Lane” raised barriers, from the company Traffic Logix, on Long Island, New York, USA.
Here’s a quote from a page on the company’s Web site promoting the barriers.
CycleLane is a smart, safe solution that provides a visual separation between vehicle and bicycle lanes. It ensures clear separation of traffic, with a unique sloped profile to prevent vehicles from entering the bike lane. The side adjacent to the vehicle lane has a high profile while the side parallel to the bike lane has a lower profile to divert bicyclists away from traffic and back into the bike lane.
Whoever wrote this evidently is not familiar with the physical concepts of center of mass or coefficient of friction. This device is a tripping hazard. A bicyclist who strays into it will not divert away from traffic, but instead will topple over into the next lane. There also is the possibility of a stopping-type incident with over-the-handlebars ejection when a bicyclist’s front wheel strikes the end of one of these barriers.
The barriers also are shown so tightly spaced that a bicyclist cannot merge into or out of the bike lane.
For these reasons, the US Manual on Uniform Traffic Control Devices, section 9C.02 says the following:
10 Posts or raised pavement markers should not be used to separate bicycle lanes from adjacent travel lanes.
11 Using raised devices creates a collision potential for bicyclists by placing fixed objects immediately adjacent to the travel path of the bicyclist. In addition, raised devices can prevent vehicles turning right from merging with the bicycle lane, which is the preferred method for making the right turn. Raised devices used to define a bicycle lane can also cause problems in cleaning and maintaining the bicycle lane.
The product is almost beyond belief; its design leaves the manufacturer wide open to liability lawsuits when bicyclists are injured or killed. The promotion could place frosting on that ugly cake, with claims of false advertising.
Still, this is only the most extreme example I’ve seen of ill-conceived, or at best, untested and unproven, marketing-driven purported safety measures targeted toward bicyclists. Some, like this one, are products, but others are design treatments which create the perception of safety without necessarily increasing actual safety.