Here, the eight most inte­res­t­ing facts of the pro­ject are explai­ned brief­ly and con­cis­e­ly: for a quick over­view of our project.

icon Ampel, WLAN

Instal­la­ti­on of Roadsi­de Units

In the TEMPUS test field, around 65 traf­fic lights are equip­ped with roadsi­de units (RSUs) that enable com­mu­ni­ca­ti­on bet­ween infra­struc­tu­re and vehic­les. A roadsi­de unit acts eit­her only as a trans­mit­ter or as a trans­mit­ter and recei­ver at the same time and can be used in dif­fe­rent ways depen­ding on the use case.

Ope­ra­ting only as a trans­mit­ter, a RSU sends infor­ma­ti­on about the cur­rent signal sta­te of a traf­fic light (SPaT) and road topo­lo­gy of the respec­ti­ve inter­sec­tion (MAP). This infor­ma­ti­on sup­ports auto­ma­ted vehic­les in safe­ly crossing an intersection.

As a trans­mit­ter and recei­ver at the same time, a RSU with return chan­nel can addi­tio­nal­ly recei­ve data from vehic­les and for­ward it to the traf­fic signal sys­tem for pro­ces­sing. This func­tion­a­li­ty is nee­ded, for exam­p­le, to acce­le­ra­te public trans­port buses or to prio­ri­ti­ze emer­gen­cy vehic­les. Due to the RSU with feed­back chan­nel the vehic­les can regis­ter at the traf­fic signal sys­tem and influence the swit­ching pha­ses, i.e. request green phases.

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Trans­mis­si­on Tech­no­lo­gies (ITSG5 and CV2X)

WLAN and cellular-based near-field com­mu­ni­ca­ti­on tech­no­lo­gies are being tes­ted which allows a gre­at fle­xi­bi­li­ty and varie­ty in appli­ca­ti­on testing.

Auto­ma­ted vehic­les need safety-critical infor­ma­ti­on within a frac­tion of a second, espe­ci­al­ly at inter­sec­tions, to be able to react appro­pria­te­ly. Curr­ent­ly, only near-field com­mu­ni­ca­ti­on via ITSG5 (WLAN-based) and CV2X (cellular-based) gua­ran­tees suf­fi­ci­ent­ly short laten­ci­es. In prin­ci­ple, both tech­no­lo­gies offer the same ran­ge of func­tions and dif­fer only in the trans­mis­si­on tech­no­lo­gy used. Due to the lack of stan­dar­diza­ti­on, it is not yet pos­si­ble to pre­dict which tech­no­lo­gy will pre­vail in Euro­pe in the future. Non-time-critical appli­ca­ti­ons, such as public trans­port acce­le­ra­ti­on, can also be hand­led via the clas­sic 5G mobi­le net­work in the future.

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Data Trans­mit­ted to the Vehic­les (SPaT/MAP)

Via roadsi­de units, infor­ma­ti­on on road topo­lo­gy (MAP) and on the cur­rent pha­se of the traf­fic signal sys­tem (SPaT) is sent to auto­ma­ted vehicles.

A MAP file is a digi­tal image of the respec­ti­ve inter­sec­tion, in which rou­te infor­ma­ti­ons are also stored. This enables auto­ma­ted vehic­les to loca­te them­sel­ves at the inter­sec­tion and assign the valid signal image to the respec­ti­ve lane.

The SPaT file (Signal Pha­se and Timing) con­ta­ins the cur­rent signal of a traf­fic light, which can be trans­mit­ted digi­tal­ly by the roadsi­de unit. In addi­ti­on to the visi­ble per­cep­ti­on by vehic­le came­ras, a second red­un­dant signal is thus available to the auto­ma­ted vehic­les. This is nee­ded, for exam­p­le, if the came­ra image can­not be reli­ed on in poor visi­bi­li­ty con­di­ti­ons. Fur­ther­mo­re, the SPaT file can be used to pro­vi­de the vehic­le with the pre­dic­ted remai­ning time of the signal, which can be used to adjust the dri­ving beha­vi­or in the cour­se of the inter­sec­tion approach.

By trans­mit­ting both file types, the com­plex situa­ti­on of an inter­sec­tion is made com­pre­hen­si­ble to the auto­ma­ted vehic­le and relia­ble and safe tra­vel across the inter­sec­tion is made possible.

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Cross-Territorial Test Field

Our test field covers both the urban area and the sur­roun­ding regi­on. This allows us to test our use cases across a wide ran­ge of traf­fic situa­tions and circumstances.

The term “cross-territorial” impli­es that seve­ral muni­ci­pa­li­ties or admi­nis­tra­ti­ve levels are invol­ved in the pro­ject. For TEMPUS it regards the City of Munich respon­si­ble for the urban area as well as the Bava­ri­an Sta­te Con­s­truc­tion Direc­to­ra­te respon­si­ble for the sur­roun­ding area of Munich. As dif­fe­rent road types are assi­gned to the two admi­nis­tra­ti­ve levels (for exam­p­le urban roads, fede­ral roads, high­ways), the use cases can be tes­ted under a wide varie­ty of traf­fic situa­tions and con­di­ti­ons within the frame­work of TEMPUS. It is also cru­cial for the crea­ti­on of traf­fic regu­la­ti­on stra­te­gies to clo­se­ly coope­ra­te with the aut­ho­ri­ties bey­ond the city boundaries.

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HD-Map of the Enti­re Test Field

A high pre­cis­i­on and rea­li­stic 3D model is being crea­ted for the com­ple­te road net­work of the cross-territorial test field, con­sis­ting of urban roads, fede­ral high­ways and free­ways. This allows auto­ma­ted and con­nec­ted vehic­les, as an exam­p­le, to detect their own loca­ti­on on the road map and plan their maneu­vers. Due to their devia­ti­on of up to seve­ral meters, con­ven­tio­nal GPS solu­ti­ons can­not pro­vi­de the requi­red accu­ra­cy. The HD-map is available to inte­res­ted com­pa­nies for test­ing pur­po­ses on request.
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Across all Road User

Appli­ca­ti­ons will be imple­men­ted on indi­vi­du­al and public trans­port and the beha­vi­or of and inter­ac­tion with non-motorized road users will be investigated.

Thus, all road users are con­side­red and a holi­stic impro­ve­ment of the traf­fic situa­ti­on can be ensured.

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Mobi­li­ty Data Space (MDM)

Via the natio­nal Mobi­li­ty Data Mar­ket­place (MDM), we publish traf­fic data as well as the muni­ci­pal traf­fic stra­te­gies deve­lo­ped in TEMPUS.

The MDM is an online por­tal pro­vi­ding a wide varie­ty of traf­fic data. As a neu­tral B2B plat­form, it sets stan­dards for data exch­an­ge and offers a rich data­ba­se for third par­ties and pri­va­te ser­vice pro­vi­ders. By publi­shing the data coll­ec­ted in TEMPUS, they are also available to third par­ties and can be used for free for future deve­lo­p­ments. For exam­p­le, vehic­le manu­fac­tu­r­ers and navi­ga­ti­on ser­vice pro­vi­ders can take advan­ta­ge of the traf­fic stra­te­gies crea­ted and inte­gra­te them into their rou­ting system.

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Real-Life Test­ing

Test­ing on public roads in real-life, i.e., in rea­li­stic traf­fic situa­tions, allows us to effec­tively impro­ve and adapt to real-life conditions.

Test­ing in real-life traf­fic can depict various inci­dents of dai­ly traf­fic and thus con­tri­bu­te to impro­ving the technology.