Table 3.11.3.3.2.A—Road safety barrier end terminal types and applications Barrier Type Application Benefits Design considerations QTMR MELT Approach end Effective at A flared gating terminal on guardrail. preventing egress terminal that may through the requires large guardrail end. clear space; Standard Generally will not end fit in an terminal. environment QTMR Standard Used on the Effective at Requires large Departure Terminal departure end of the preventing egress clear space; guardrail with minimal through the Only a departure flare from the straight guardrail end. terminal. and is down’ ‘tied Standard end using a tensioned terminal type steel cable. Gating Re-directive Approach and Tangential Proprietary Guardrail End departure end guardrail end products; Terminals terminal on guardrail. treatment where Gating terminal there is that may require insufficient space large clear space; for a flared Expensive when terminal; compared to Designed for MELT installation on a straight alignment; Available in TL-2 and TL-3 (<100kph) design speeds. Non-gating end Approach and A non-gating Proprietary terminals departure end guardrail end products; terminal on guardrail. terminal in an Only suitable for environment, roads with a Suitable for short maximum 60kph lengths of speed limit guardrail; May be used back-to-back in medians; Suited to sites where available space for conventional barriers is limited. Crash Attenuation Approach and Are a Proprietary Terminals departure end products; terminal on Expensive to barriers such as end install and concrete barriers. terminal; maintain; Systems are tested to both
Table 3.11.3.3.2.A—Road safety barrier end terminal types and applications Barrier Type Application Benefits Design considerations QTMR MELT Approach end terminal on guardrail. Effective at preventing egress through the guardrail end. Standard end terminal. A flared gating terminal that may requires large clear space; Generally will not fit in an environment QTMR Standard Departure Terminal Used on the departure end of the guardrail with minimal flare from the straight and is ‘tied down’ using a tensioned steel cable. Effective at preventing egress through the guardrail end. Standard end terminal type Requires large clear space; Only a departure terminal. Gating Re-directive Guardrail End Terminals Approach and departure end terminal on guardrail. Tangential guardrail end treatment where there is insufficient space for a flared terminal; Designed for installation on a straight alignment; Available in TL-2 and TL-3 (<100kph) design speeds. Proprietary products; Gating terminal that may require large clear space; Expensive when compared to MELT Non-gating end terminals Approach and departure end terminal on guardrail. A non-gating guardrail end terminal in an environment, Suitable for short lengths of guardrail; May be used back-to-back in medians; Suited to sites where available space for conventional barriers is limited. Proprietary products; Only suitable for roads with a maximum 60kph speed limit Crash Attenuation Terminals Approach and departure end terminal on barriers such as concrete barriers. Are a end terminal; Systems are tested to both Proprietary products; Expensive to install and maintain;
Ch3RoadCorridorDesign.docx