opening up
noun /ˌəʊpənɪŋ ˈʌp/
  /ˌəʊpənɪŋ ˈʌp/
[singular]- the process of removing controls or limits and making something such as land or jobs available to more people- the opening up of new opportunities for women in business
 
- the process of making something ready for use- the opening up of a new stretch of highway