Statements (27)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Traffic control device
|
| gptkbp:alsoKnownAs |
merge signal
ramp signal |
| gptkbp:can_decrease |
accident rates
|
| gptkbp:canBe |
adaptive control
fixed-time control traffic-responsive control |
| gptkbp:commonIn |
gptkb:Australia
gptkb:Europe gptkb:United_States |
| gptkbp:first_implemented_in |
gptkb:Chicago
1963 |
| https://www.w3.org/2000/01/rdf-schema#label |
Ramp meter
|
| gptkbp:improves |
mainline speeds
|
| gptkbp:mayInclude |
HOV bypass lanes
mainline detectors queue detectors |
| gptkbp:operates |
traffic lights
|
| gptkbp:purpose |
reduce congestion
improve traffic safety |
| gptkbp:reduces |
traffic bottlenecks
|
| gptkbp:sometimes_causes |
delays on surface streets
ramp queue spillback |
| gptkbp:typically_located_at |
on-ramps to freeways
|
| gptkbp:usedFor |
controlling vehicle flow onto freeways
|
| gptkbp:bfsParent |
gptkb:road
|
| gptkbp:bfsLayer |
4
|