Of the 23 highway deaths of pedestrians this year, 17 of the victims did something rash, said the Policía de Tránsito.
The police agency issued a warning Monday after a weekend that saw three such deaths.
Part of the problem is the reluctance of some pedestrians to use the expensive bridges have have been constructed so they can cross busy multi-lane highways.
A favorite pastime of television camera operators is to video pedestrians tempting fate by crossing a busy highway in the shadow of a pedestrian bridge.
The traffic police issued typical suggestions such as wearing bright or reflective clothing and to walk facing the traffic.
Particularly in rural areas, the highway is the preferred path and there are few sidewalks or even shoulders for pedestrians.
Police also noted that nine of the dead pedestrians had ingested alcohol.