'straddle boundaries' is a correct and usable phrase in written English.
You can use this phrase when referring to crossing something that divides two separate areas or groups. For example, "The new product launch was able to straddle boundaries between the younger and older generations of customers."
The propensity for air pollution to straddle boundaries has political, as well as medical, implications.
Some tools clearly straddle boundaries within the definition: Significant Event Analyses (SEA) (a technique commonly used in the UK), for example, straddles past events, future anticipation of similar situations and learning in relation to the significant event.
It brings together musicians and businesspeople who are devoted to music that straddles boundaries of style and nationality.
The catchment basin area straddles boundary of two climate zones the Mediterranean climate zone in areas at elevations up to 400 m a.s.l, and the continental climate zone in other parts of the basin.
In Europe's crowded waters fish stocks and historic fishing rights straddle national boundaries.
They straddle the boundaries of the public and private, the respectable and the reviled.
But there are some people who can't be categorised – creative personalities who straddle conventional boundaries in a unique way.
Most of the earthquake-prediction programmes that blossomed in those rich countries that straddle plate boundaries have since been recognised as failures, and closed.
These are enormously difficult questions to answer with confidence, not least because they straddle the boundaries between intellectual, social and psychoanalytic history.
The list also features sites that straddle national boundaries, like the Jesuit missions built to indoctrinate the Guaraní Indians in Argentina, Brazil and Paraguay.
Escher, the Dutch graphic artist whose mind-bending prints straddle the boundaries between art and science, once observed that he felt "more in common with mathematicians than with my fellow artists".
