▁data ▁over la id ▁on ▁street ▁maps ▁and ▁updating ▁in ▁real - time . ▁ ▁Ada pt ive ▁Tra ffic ▁Management ▁▁ ▁ST RE A MS ▁implements ▁adapt ive ▁traffic ▁management ▁through ▁a ▁feature ▁called ▁" Dynamic ▁Plan ▁Selection ". ▁Depending ▁on ▁the ▁density ▁of ▁traffic ▁( occup ancy ) ▁and ▁the ▁dominant ▁direction ▁of ▁traffic ▁( for ▁example , ▁in bound , ▁out bound , ▁or ▁bid irection al ) ▁on ▁a ▁road , ▁nearby ▁signal ised ▁inter sections ▁are ▁operated ▁using ▁several ▁pre defined ▁traffic ▁plans . ▁A ▁user ▁sets ▁up ▁the ▁signal ▁timing , ▁and ▁pick s ▁the ▁traffic ▁density ▁levels ▁and ▁direction ▁that ▁they ▁apply ▁to . ▁Select ing ▁the ▁appropriate ▁signal ▁timing ▁is ▁then ▁automatic . ▁When ▁a ▁time ▁based ▁traffic ▁plan ▁schedule ▁would ▁be ▁in app ropri ate ▁because ▁of ▁varying ▁traffic ▁levels , ▁ST RE A MS ▁Dynamic ▁Plan ▁Selection ▁can ▁adapt ▁to ▁unexpected ▁traffic ▁levels ▁as ▁they ▁arise . ▁ ▁With ▁help ▁from ▁the ▁academic ▁community , ▁ST RE A MS ▁Sm art ▁Motor ways ▁offers ▁the ▁coordin ated ▁r amp - meter ing ▁algorithm ▁suite ▁AL INE A / HER O . ▁The ▁mod ular ▁architecture ▁of ▁ST RE A MS ▁allows ▁Trans max ▁to ▁integrate ▁new ▁algorithms ▁as ▁they ▁become ▁available . ▁ST RE A MS ▁applies ▁the ▁computed ▁meter ing ▁rates ▁using ▁r amp ▁signal ▁controllers ▁deployed ▁at ▁the ▁road side . ▁Cont rolling ▁multiple ▁consecutive ▁ram ps , ▁ide ally ▁the ▁whole ▁motor way , ▁makes ▁it ▁possible ▁to ▁maintain ▁a