One-hundredth rally / Regularity ride

A one-hundredth rally (regularity ride) is a sporting and social event primarily intended for historic vehicles, where the goal is not to achieve the shortest times in speed tests, but the most precise times when passing through checkpoints. The race is not held on a closed track, but in normal road traffic, and therefore it is essential to strictly adhere to all traffic rules. Crews navigate the track using a detailed arrow itinerary, known as a roadbook, which determines the route and timetable of the entire competition.

Briefly on the Rules of a One-hundredth rally (Regularity ride)

A regularity rally is a competition focused on precision and consistent driving, not on maximum speed. The basic aids for each crew are the roadbook (arrow itinerary) and the board card – these are received by the crew shortly before the start. The roadbook serves as navigation, and the board card is for recording time checks and other data.

Crews drive an unknown route in advance in normal traffic and on ordinary roads, so they must obey traffic rules. On the route, crews also perform various precision tests and other supplementary tasks. Each stage has a prescribed average speed or time quota, which determines the ideal arrival time at the time control (TC). For example: with a start at 12:00 and a stage duration of 28 minutes, the ideal arrival is at 12:28 – passing outside the time window (12:28:01–12:28:59) is penalized.

Stopwatches, calculators, and calculation skills are essential equipment – they help in estimating the correct average speed and precise timing of arrival. For easier calculations, you can use our practical calculators found below the article.

When driving, the crew follows symbolic diagrams, with a simple rule: always drive from the dot to the arrow. The itinerary serves as the main navigation aid, yet it does not show all intersections and traffic situations. If an intersection is missing from the roadbook, continue along the main road.

The board card (driving record) is a document into which the times of control passes and the results of supplementary tests are recorded. Crews receive the board card at the start of the rally and hand it in at the finish. Its loss is punished with a penalty.

The winner is the crew with the lowest number of penalty points. In addition to the overall standings, various categories and supplementary competitions are often announced, as the main goal is fun, sporting experiences, and shared joy from driving.

Measured Hundredth-of-a-Second Sections

A specialty of regularity rallies are the so-called precision tests (PT), during which time is measured to hundredths of a second on selected sections – most often using photocells or pressure hoses. This is where the name “rOne-hundredth rally” comes from.

Special measured hundredth-of-a-second sections are marked in the roadbook, and crews have various tactics on how to precisely hit the passage through the finish photocell. Each deviation of ± 0.01 seconds from the prescribed time means 1 penalty point. For example, if a crew is supposed to complete a 120-meter measured section in exactly 19.00 seconds, and the resulting time is 19.89 seconds, a deviation of 0.89 seconds means 89 penalty points. Stopping in this measured section is forbidden and penalized!

Advice and Tips for a Regularity Rally:

• carefully study the roadbook before the start – it will save you stress during the drive
• mark each point after passing it – this will help you quickly determine where you were last correct if you get lost
• do not rely only on the diagrams, but also monitor the individual and total distances between points
• not all intersections and passages are drawn – if a point is missing from the roadbook, continue along the main road
• during a detour, follow the signs and return to the original route as soon as possible
• drive independently and do not follow cars in front of you – they may also be off track

ONE-HUNDREDTH RALLY USEFUL CALCULATORS: