[et_pb_section fb_built=”1″ _builder_version=”4.16″ global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_image src=”https:\/\/irap.org\/wp-content\/uploads\/2020\/02\/Decimal-Star-Ratings.jpg” align_tablet=”center” align_phone=”” align_last_edited=”on|desktop” admin_label=”Image – banner” _builder_version=”4.16″ always_center_on_mobile=”on” global_colors_info=”{}”][\/et_pb_image][et_pb_text admin_label=”Text – Descripion” _builder_version=”4.27.4″ hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n
Decimal Star Ratings offer a <\/span>more sensitive, nuanced, and actionable<\/span> way to understand and communicate road safety. Whether you’re evaluating infrastructure improvements, analysing safety scenarios, or tracking progress along a road corridor, decimal ratings give you that extra layer of insight beyond whole-star thresholds.<\/span>\u00a0<\/span><\/p>\n \u00a0<\/span>Decimal Star Ratings are an enhancement of the traditional 1- to 5-star rating system used by iRAP to express road safety risk. Traditional Star Ratings assign a whole<\/span>\u2011<\/span>number rating (1<\/span>\u2011<\/span>5) based on a Star Rating Score (SRS), which reflects the relative risk of death or serious injury for road users\u2014through vehicle, motorcycle, cyclist, and pedestrian metrics\u2014using a model based on road attributes.\u00a0<\/span>\u00a0<\/span><\/p>\n \u00a0<\/span>Decimal Star Ratings add granularity within each star band by subdividing each whole<\/span>\u2011<\/span>star band into tenths. This finer representation allows you to see where exactly within the band the score falls\u2014e.g., 3.5 indicates the middle of the 3<\/span>\u2011<\/span>star band, while 3.9 is near the top.<\/span>\u00a0<\/span><\/p>\n Enhanced resolution:<\/span><\/b> Whole<\/span>\u2011<\/span>star jumps can be broad. The decimal ratings helps highlight even small safety improvements, which might not otherwise result in a full star increase but still represent meaningful progress.\u00a0<\/span>\u00a0<\/span><\/p>\n Better decision support:<\/span><\/b> In tools like iRAP\u2019s Star Rating Demonstrator and Route Review Tool (RRT), decimal ratings enable clearer evaluation of incremental improvements\u2014useful in scenario testing or network<\/span>\u2011<\/span>level assessments.\u00a0<\/span>\u00a0<\/span><\/p>\n Route-level insight<\/span><\/b>: For longer routes, the <\/span>Route Decimal Star Rating<\/span><\/b> is typically a flow-weighted average over all assessed segments. This helps engineers prioritise those sections where the largest impacts of improvements would be.<\/span>\u00a0<\/span><\/p>\n [\/et_pb_text][et_pb_text admin_label=”Text – Status” _builder_version=”4.27.4″ global_colors_info=”{}”]<\/p>\n D<\/span>ecimal <\/span>Star R<\/span>atings are implemented in tools like the Star Rating Demonstrator (<\/span>ViDA<\/span> platform), replacing the former Star Rating Score display with decimal values<\/span>. Decimal Star Ratings will be fully implemented in early 2027.\u00a0<\/span><\/span>\u00a0<\/span><\/p>\n [\/et_pb_text][et_pb_text admin_label=”Text – Partners heading” _builder_version=”4.16″ global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_4,1_4,1_4,1_4″ _builder_version=”4.16″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” global_colors_info=”{}”][et_pb_column type=”1_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_blurb title=”iRAP” url=”https:\/\/irap.org” url_new_window=”on” image=”https:\/\/irap.org\/wp-content\/uploads\/2018\/08\/Same-size-iRAP.png” admin_label=”Blurb – Partner iRAP” _builder_version=”4.16″ animation=”off” global_colors_info=”{}”][\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_blurb title=”KiwiRAP” url=”http:\/\/www.kiwirap.org.nz\/” url_new_window=”on” image=”https:\/\/irap.org\/wp-content\/uploads\/2018\/08\/Same-size-KiwiRAP.png” admin_label=”Blurb – Partner KiwiRAP” _builder_version=”4.16″ animation=”off” global_colors_info=”{}”][\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_blurb title=”Austroads” url=”http:\/\/www.austroads.com.au\/” url_new_window=”on” image=”https:\/\/irap.org\/wp-content\/uploads\/2018\/08\/Same-size-Austroads.png” admin_label=”Blurb – Partner Austroads” _builder_version=”4.16″ animation=”off” global_colors_info=”{}”][\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_blurb title=”Queensland TMR” url=”http:\/\/tmr.qld.gov.au” url_new_window=”on” image=”https:\/\/irap.org\/wp-content\/uploads\/2018\/08\/Same-size-Qld-TMR.png” admin_label=”Blurb – Partner Qld TMR” _builder_version=”4.16″ animation=”off” global_colors_info=”{}”][\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" Description Decimal Star Ratings offer a more sensitive, nuanced, and actionable way to understand and communicate road safety. Whether you’re evaluating infrastructure improvements, analysing safety scenarios, or tracking progress along […]<\/p>\n","protected":false},"author":4,"featured_media":31741,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"project_category":[],"project_tag":[],"class_list":["post-31740","project","type-project","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nWhat are Decimal Star Ratings?<\/span><\/b>\u00a0<\/span><\/h2>\n
Status<\/strong><\/h2>\n
Partners<\/h2>\n